diff --git a/ports/cocos2d/portfile.cmake b/ports/cocos2d/portfile.cmake
index 6359055f1..46f1ee3ab 100644
--- a/ports/cocos2d/portfile.cmake
+++ b/ports/cocos2d/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/cocos2d-x-cocos2d-x-3.10)
 vcpkg_download_distfile(ARCHIVE_FILE
     URLS "https://github.com/cocos2d/cocos2d-x/archive/cocos2d-x-3.10.tar.gz"
     FILENAME "cocos2d-x-3.10.tar.gz"
@@ -12,7 +13,7 @@ vcpkg_download_distfile(DEPS_ARCHIVE_FILE
 
 vcpkg_extract_source_archive(${ARCHIVE_FILE})
 
-if(NOT EXISTS ${CURRENT_BUILDTREES_DIR}/src/cocos2d-x-cocos2d-x-3.10/external/unzip)
+if(NOT EXISTS ${SOURCE_PATH}/external/unzip)
     message(STATUS "Extracting dependencies ${DEPS_ARCHIVE_FILE}")
     file(MAKE_DIRECTORY ${CURRENT_BUILDTREES_DIR}/deps)
     vcpkg_execute_required_process(
@@ -20,15 +21,15 @@ if(NOT EXISTS ${CURRENT_BUILDTREES_DIR}/src/cocos2d-x-cocos2d-x-3.10/external/un
         WORKING_DIRECTORY ${CURRENT_BUILDTREES_DIR}/deps
         LOGNAME extract-deps
     )
-    file(REMOVE_RECURSE ${CURRENT_BUILDTREES_DIR}/src/cocos2d-x-cocos2d-x-3.10/external)
-    file(RENAME ${CURRENT_BUILDTREES_DIR}/deps/cocos2d-x-3rd-party-libs-bin-3-deps-79 ${CURRENT_BUILDTREES_DIR}/src/cocos2d-x-cocos2d-x-3.10/external)
+    file(REMOVE_RECURSE ${SOURCE_PATH}/external)
+    file(RENAME ${CURRENT_BUILDTREES_DIR}/deps/cocos2d-x-3rd-party-libs-bin-3-deps-79 ${SOURCE_PATH}/external)
 endif()
 message(STATUS "Extracting dependencies done")
 
-file(REMOVE ${CURRENT_BUILDTREES_DIR}/src/cocos2d-x-cocos2d-x-3.10/cmake/Modules/FindGLFW3.cmake)
+file(REMOVE ${SOURCE_PATH}/cmake/Modules/FindGLFW3.cmake)
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/cocos2d-x-cocos2d-x-3.10
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS
         -DUSE_CHIPMUNK=OFF
         -DUSE_BOX2D=OFF
@@ -42,6 +43,6 @@ vcpkg_configure_cmake(
 vcpkg_build_cmake()
 vcpkg_install_cmake()
 
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/cocos2d-x-cocos2d-x-3.10/licenses/LICENSE_cocos2d-x.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/cocos2d-x RENAME copyright)
+file(INSTALL ${SOURCE_PATH}/licenses/LICENSE_cocos2d-x.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/cocos2d-x RENAME copyright)
 vcpkg_copy_pdbs()
 
diff --git a/ports/constexpr/portfile.cmake b/ports/constexpr/portfile.cmake
index 592e67094..137bf0e60 100644
--- a/ports/constexpr/portfile.cmake
+++ b/ports/constexpr/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/constexpr-a98b1db39c909e0130d21d3910d4faf97035a625)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/elbeno/constexpr/archive/a98b1db39c909e0130d21d3910d4faf97035a625.zip"
     FILENAME "constexpr-a98b1db39c909e0130d21d3910d4faf97035a625.zip"
@@ -7,10 +8,9 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 # Put the licence file where vcpkg expects it
-set(SOURCE_DIR ${CURRENT_BUILDTREES_DIR}/src/constexpr-a98b1db39c909e0130d21d3910d4faf97035a625)
-file(COPY ${SOURCE_DIR}/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/constexpr/LICENSE)
+file(COPY ${SOURCE_PATH}/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/constexpr/LICENSE)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/constexpr/LICENSE ${CURRENT_PACKAGES_DIR}/share/constexpr/copyright)
 
 # Copy the constexpr header files
-file(GLOB HEADER_FILES ${SOURCE_DIR}/src/include/*.h)
+file(GLOB HEADER_FILES ${SOURCE_PATH}/src/include/*.h)
 file(COPY ${HEADER_FILES} DESTINATION ${CURRENT_PACKAGES_DIR}/include)
diff --git a/ports/curl/portfile.cmake b/ports/curl/portfile.cmake
index 168d5f0ff..1369627d8 100644
--- a/ports/curl/portfile.cmake
+++ b/ports/curl/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/curl-7.48.0)
 vcpkg_download_distfile(ARCHIVE_FILE
     URLS "https://curl.haxx.se/download/curl-7.48.0.tar.bz2"
     FILENAME "curl-7.48.0.tar.bz2"
@@ -7,7 +8,7 @@ vcpkg_download_distfile(ARCHIVE_FILE
 vcpkg_extract_source_archive(${ARCHIVE_FILE})
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/curl-7.48.0
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS
         -DBUILD_CURL_TESTS=OFF
         -DBUILD_CURL_EXE=OFF
@@ -19,6 +20,6 @@ vcpkg_configure_cmake(
 vcpkg_build_cmake()
 vcpkg_install_cmake()
 
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/curl-7.48.0/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/curl RENAME copyright)
+file(INSTALL ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/curl RENAME copyright)
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
 vcpkg_copy_pdbs()
\ No newline at end of file
diff --git a/ports/doctest/portfile.cmake b/ports/doctest/portfile.cmake
index 54228c716..c392b2467 100644
--- a/ports/doctest/portfile.cmake
+++ b/ports/doctest/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/doctest-1.1.0)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/onqtam/doctest/archive/1.1.0.zip"
     FILENAME "doctest-1.1.0.zip"
@@ -7,7 +8,7 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 # Handle copyright
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/doctest-1.1.0/LICENSE.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/doctest RENAME copyright)
+file(INSTALL ${SOURCE_PATH}/LICENSE.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/doctest RENAME copyright)
 
 # Copy header file
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/doctest-1.1.0/doctest/doctest.h DESTINATION ${CURRENT_PACKAGES_DIR}/include/doctest)
+file(INSTALL ${SOURCE_PATH}/doctest/doctest.h DESTINATION ${CURRENT_PACKAGES_DIR}/include/doctest)
diff --git a/ports/eigen3/portfile.cmake b/ports/eigen3/portfile.cmake
index 763143a05..416a4c9a9 100644
--- a/ports/eigen3/portfile.cmake
+++ b/ports/eigen3/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/eigen-eigen-dc6cfdf9bcec)
 vcpkg_download_distfile(ARCHIVE
     URLS "http://bitbucket.org/eigen/eigen/get/3.2.9.tar.bz2"
     FILENAME "eigen-3.2.9.tar.bz2"
@@ -7,13 +8,12 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 # Put the licence file where vcpkg expects it
-file(RENAME ${CURRENT_BUILDTREES_DIR}/src/eigen-eigen-dc6cfdf9bcec ${CURRENT_BUILDTREES_DIR}/src/eigen)
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/eigen/COPYING.README DESTINATION ${CURRENT_PACKAGES_DIR}/share/eigen3/COPYING.README)
+file(COPY ${SOURCE_PATH}/COPYING.README DESTINATION ${CURRENT_PACKAGES_DIR}/share/eigen3/COPYING.README)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/eigen3/COPYING.README ${CURRENT_PACKAGES_DIR}/share/eigen3/copyright)
 
-file(GLOB_RECURSE GARBAGE ${CURRENT_BUILDTREES_DIR}/src/eigen/Eigen/CMakeLists.*)
+file(GLOB_RECURSE GARBAGE ${SOURCE_PATH}/Eigen/CMakeLists.*)
 file(REMOVE ${GARBAGE})
 
 # Copy the eigen header files
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/eigen/Eigen/ DESTINATION ${CURRENT_PACKAGES_DIR}/include/Eigen/)
+file(COPY ${SOURCE_PATH}/Eigen/ DESTINATION ${CURRENT_PACKAGES_DIR}/include/Eigen/)
 vcpkg_copy_pdbs()
diff --git a/ports/expat/portfile.cmake b/ports/expat/portfile.cmake
index ea0f0f723..2945a0c8f 100644
--- a/ports/expat/portfile.cmake
+++ b/ports/expat/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/expat-2.1.1)
 vcpkg_download_distfile(ARCHIVE_FILE
     URLS "http://downloads.sourceforge.net/project/expat/expat/2.1.1/expat-2.1.1.tar.bz2"
     FILENAME "expat-2.1.1.tar.bz2"
@@ -7,7 +8,7 @@ vcpkg_download_distfile(ARCHIVE_FILE
 vcpkg_extract_source_archive(${ARCHIVE_FILE})
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/expat-2.1.1
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS
         -DBUILD_examples=OFF
         -DBUILD_tests=OFF
@@ -18,5 +19,5 @@ vcpkg_build_cmake()
 vcpkg_install_cmake()
 
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include ${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig ${CURRENT_PACKAGES_DIR}/lib/pkgconfig)
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/expat-2.1.1/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/expat RENAME copyright)
+file(INSTALL ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/expat RENAME copyright)
 vcpkg_copy_pdbs()
\ No newline at end of file
diff --git a/ports/fmt/portfile.cmake b/ports/fmt/portfile.cmake
index 49a0f3ef5..cf3b0df88 100644
--- a/ports/fmt/portfile.cmake
+++ b/ports/fmt/portfile.cmake
@@ -1,5 +1,5 @@
 include(vcpkg_common_functions)
-
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/fmt-3.0.0)
 vcpkg_download_distfile(ARCHIVE_FILE
     URLS "https://github.com/fmtlib/fmt/archive/3.0.0.tar.gz"
     FILENAME "fmt-3.0.0.tar.gz"
@@ -8,7 +8,7 @@ vcpkg_download_distfile(ARCHIVE_FILE
 vcpkg_extract_source_archive(${ARCHIVE_FILE})
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/fmt-3.0.0
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS
         -DFMT_TEST=OFF
 )
@@ -16,7 +16,7 @@ vcpkg_configure_cmake(
 vcpkg_build_cmake()
 
 vcpkg_install_cmake()
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/fmt-3.0.0/LICENSE.rst DESTINATION ${CURRENT_PACKAGES_DIR}/share/fmt RENAME copyright)
+file(INSTALL ${SOURCE_PATH}/LICENSE.rst DESTINATION ${CURRENT_PACKAGES_DIR}/share/fmt RENAME copyright)
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
 file(REMOVE ${CURRENT_PACKAGES_DIR}/include/fmt/format.cc)
 file(REMOVE ${CURRENT_PACKAGES_DIR}/include/fmt/ostream.cc)
diff --git a/ports/freetype/portfile.cmake b/ports/freetype/portfile.cmake
index c618cb23a..a98bb731c 100644
--- a/ports/freetype/portfile.cmake
+++ b/ports/freetype/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/freetype-2.6.3)
 vcpkg_download_distfile(ARCHIVE
     URLS "http://download.savannah.gnu.org/releases/freetype/freetype-2.6.3.tar.bz2"
     FILENAME "freetype-2.6.3.tar.bz2"
@@ -7,12 +8,12 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 vcpkg_apply_patches(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/freetype-2.6.3
+    SOURCE_PATH ${SOURCE_PATH}
     PATCHES ${CMAKE_CURRENT_LIST_DIR}/0001-Support-Windows-DLLs-via-CMAKE_WINDOWS_EXPORT_ALL_SY.patch
 )
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/freetype-2.6.3
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS
         -DBUILD_SHARED_LIBS=ON
 )
@@ -31,9 +32,9 @@ file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/lib/cmake)
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/lib/cmake)
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
 file(COPY
-    ${CURRENT_BUILDTREES_DIR}/src/freetype-2.6.3/docs/LICENSE.TXT
-    ${CURRENT_BUILDTREES_DIR}/src/freetype-2.6.3/docs/FTL.TXT
-    ${CURRENT_BUILDTREES_DIR}/src/freetype-2.6.3/docs/GPLv2.TXT
+    ${SOURCE_PATH}/docs/LICENSE.TXT
+    ${SOURCE_PATH}/docs/FTL.TXT
+    ${SOURCE_PATH}/docs/GPLv2.TXT
     DESTINATION ${CURRENT_PACKAGES_DIR}/share/freetype
 )
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/freetype/LICENSE.TXT ${CURRENT_PACKAGES_DIR}/share/freetype/copyright)
diff --git a/ports/glew/portfile.cmake b/ports/glew/portfile.cmake
index cd7bbdf9d..3b35830f6 100644
--- a/ports/glew/portfile.cmake
+++ b/ports/glew/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0)
 vcpkg_download_distfile(ARCHIVE_FILE
     URLS "http://downloads.sourceforge.net/project/glew/glew/1.13.0/glew-1.13.0.tgz"
     FILENAME "glew-1.13.0.tgz"
@@ -15,9 +16,9 @@ ELSE()
 	SET(BUILD_ARCH ${TRIPLET_SYSTEM_ARCH})
 ENDIF()
 
-if(NOT EXISTS ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/build/vc12/glew_shared14.vcxproj)
+if(NOT EXISTS ${SOURCE_PATH}/build/vc12/glew_shared14.vcxproj)
     message(STATUS "Upgrading projects")
-    file(READ ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/build/vc12/glew_shared.vcxproj PROJ)
+    file(READ ${SOURCE_PATH}/build/vc12/glew_shared.vcxproj PROJ)
     string(REPLACE
         "<PlatformToolset>v120</PlatformToolset>"
         "<PlatformToolset>v140</PlatformToolset>"
@@ -26,38 +27,38 @@ if(NOT EXISTS ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/build/vc12/glew_shared14
         "opengl32.lib%"
         "opengl32.lib\;%"
         PROJ ${PROJ})
-    file(WRITE ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/build/vc12/glew_shared14.vcxproj ${PROJ})
+    file(WRITE ${SOURCE_PATH}/build/vc12/glew_shared14.vcxproj ${PROJ})
 endif()
 message(STATUS "Upgrading projects done")
 
 vcpkg_build_msbuild(
-    PROJECT_PATH ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/build/vc12/glew_shared14.vcxproj
+    PROJECT_PATH ${SOURCE_PATH}/build/vc12/glew_shared14.vcxproj
 )
 
 message(STATUS "Installing")
 
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/bin/Debug/${BUILD_ARCH}/glew32d.dll
-    ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/bin/Debug/${BUILD_ARCH}/glew32d.pdb
+    ${SOURCE_PATH}/bin/Debug/${BUILD_ARCH}/glew32d.dll
+    ${SOURCE_PATH}/bin/Debug/${BUILD_ARCH}/glew32d.pdb
     DESTINATION ${CURRENT_PACKAGES_DIR}/debug/bin
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/bin/Release/${BUILD_ARCH}/glew32.dll
-    ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/bin/Release/${BUILD_ARCH}/glew32.pdb
+    ${SOURCE_PATH}/bin/Release/${BUILD_ARCH}/glew32.dll
+    ${SOURCE_PATH}/bin/Release/${BUILD_ARCH}/glew32.pdb
     DESTINATION ${CURRENT_PACKAGES_DIR}/bin
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/lib/Debug/${BUILD_ARCH}/glew32d.lib
+    ${SOURCE_PATH}/lib/Debug/${BUILD_ARCH}/glew32d.lib
     DESTINATION ${CURRENT_PACKAGES_DIR}/debug/lib
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/lib/Release/${BUILD_ARCH}/glew32.lib
+    ${SOURCE_PATH}/lib/Release/${BUILD_ARCH}/glew32.lib
     DESTINATION ${CURRENT_PACKAGES_DIR}/lib
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/include/GL
+    ${SOURCE_PATH}/include/GL
     DESTINATION ${CURRENT_PACKAGES_DIR}/include
 )
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/glew-1.13.0/LICENSE.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/glew RENAME copyright)
+file(INSTALL ${SOURCE_PATH}/LICENSE.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/glew RENAME copyright)
 vcpkg_copy_pdbs()
 message(STATUS "Installing done")
diff --git a/ports/glfw3/portfile.cmake b/ports/glfw3/portfile.cmake
index 6d14c34fe..5828122ec 100644
--- a/ports/glfw3/portfile.cmake
+++ b/ports/glfw3/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/glfw-3.1.2)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/glfw/glfw/releases/download/3.1.2/glfw-3.1.2.zip"
     FILENAME "glfw-3.1.2.zip"
@@ -7,20 +8,20 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 if(NOT EXISTS ${CURRENT_BUILDTREES_DIR}/patch.stamp)
-    file(READ ${CURRENT_BUILDTREES_DIR}/src/glfw-3.1.2/src/glfw3Config.cmake.in CONFIG)
+    file(READ ${SOURCE_PATH}/src/glfw3Config.cmake.in CONFIG)
     string(REPLACE "\"@GLFW_LIB_NAME@\"" "NAMES @GLFW_LIB_NAME@ @GLFW_LIB_NAME@dll"
         CONFIG ${CONFIG}
     )
     string(REPLACE "@PACKAGE_CMAKE_INSTALL_PREFIX@" "@PACKAGE_CMAKE_INSTALL_PREFIX@/../.."
         CONFIG ${CONFIG}
     )
-    file(WRITE ${CURRENT_BUILDTREES_DIR}/src/glfw-3.1.2/src/glfw3Config.cmake.in ${CONFIG})
-    file(APPEND ${CURRENT_BUILDTREES_DIR}/src/glfw-3.1.2/src/glfw3Config.cmake.in "set(GLFW3_LIBRARIES \${GLFW3_LIBRARY})\n")
+    file(WRITE ${SOURCE_PATH}/src/glfw3Config.cmake.in ${CONFIG})
+    file(APPEND ${SOURCE_PATH}/src/glfw3Config.cmake.in "set(GLFW3_LIBRARIES \${GLFW3_LIBRARY})\n")
     file(WRITE ${CURRENT_BUILDTREES_DIR}/patch.stamp)
 endif()
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/glfw-3.1.2
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS
         -DBUILD_SHARED_LIBS=ON
         -DGLFW_BUILD_EXAMPLES=OFF
@@ -52,7 +53,7 @@ file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
 file(REMOVE ${CURRENT_PACKAGES_DIR}/lib/glfw3.lib)
 file(REMOVE ${CURRENT_PACKAGES_DIR}/debug/lib/glfw3.lib)
 
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/glfw-3.1.2/COPYING.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/glfw3)
+file(COPY ${SOURCE_PATH}/COPYING.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/glfw3)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/glfw3/COPYING.txt ${CURRENT_PACKAGES_DIR}/share/glfw3/copyright)
 vcpkg_copy_pdbs()
 
diff --git a/ports/glm/portfile.cmake b/ports/glm/portfile.cmake
index 715310149..33a16f9b8 100644
--- a/ports/glm/portfile.cmake
+++ b/ports/glm/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/glm)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/g-truc/glm/releases/download/0.9.8.0/glm-0.9.8.0.zip"
     FILENAME "glm-0.9.8.0.zip"
@@ -7,12 +8,12 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 # Remove glm/CMakeLists.txt
-file(REMOVE ${CURRENT_BUILDTREES_DIR}/src/glm/glm/CMakeLists.txt)
+file(REMOVE ${SOURCE_PATH}/glm/CMakeLists.txt)
 
 # Put the license file where vcpkg expects it
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/glm/copying.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/glm/)
+file(COPY ${SOURCE_PATH}/copying.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/glm/)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/glm/copying.txt ${CURRENT_PACKAGES_DIR}/share/glm/copyright)
 
 # Copy the glm header files
-file(GLOB HEADER_FILES ${CURRENT_BUILDTREES_DIR}/src/glm/glm/*)
+file(GLOB HEADER_FILES ${SOURCE_PATH}/glm/*)
 file(COPY ${HEADER_FILES} DESTINATION ${CURRENT_PACKAGES_DIR}/include/glm)
diff --git a/ports/gsl/portfile.cmake b/ports/gsl/portfile.cmake
index 4c7e9f051..e674cf2e4 100644
--- a/ports/gsl/portfile.cmake
+++ b/ports/gsl/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/gsl-fd5ad87bf25cb5e87104ee58106dee9bc809cd93)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/Microsoft/GSL/archive/fd5ad87bf25cb5e87104ee58106dee9bc809cd93.zip"
     FILENAME "gsl-fd5ad87bf.zip"
@@ -6,8 +7,8 @@ vcpkg_download_distfile(ARCHIVE
 )
 vcpkg_extract_source_archive(${ARCHIVE})
 
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/gsl-fd5ad87bf25cb5e87104ee58106dee9bc809cd93/gsl DESTINATION ${CURRENT_PACKAGES_DIR}/include FILES_MATCHING PATTERN "*")
+file(INSTALL ${SOURCE_PATH}/gsl DESTINATION ${CURRENT_PACKAGES_DIR}/include FILES_MATCHING PATTERN "*")
 
 # Handle copyright
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/gsl-fd5ad87bf25cb5e87104ee58106dee9bc809cd93/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/gsl)
+file(COPY ${SOURCE_PATH}/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/gsl)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/gsl/LICENSE ${CURRENT_PACKAGES_DIR}/share/gsl/copyright)
diff --git a/ports/libuv/portfile.cmake b/ports/libuv/portfile.cmake
index 2e0002b4e..d5aafdb21 100644
--- a/ports/libuv/portfile.cmake
+++ b/ports/libuv/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/libuv/libuv/archive/v1.9.1.zip"
     FILENAME "libuv-v1.9.1.zip"
@@ -52,13 +53,13 @@ if(TRIPLET_SYSTEM_ARCH MATCHES "x86|x64")
     message(STATUS "Building Release")
     vcpkg_execute_required_process(
         COMMAND cmd /c vcbuild.bat release ${TRIPLET_SYSTEM_ARCH} shared
-        WORKING_DIRECTORY ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1
+        WORKING_DIRECTORY ${SOURCE_PATH}
         LOGNAME ${TARGET_TRIPLET}-build-rel
     )
     message(STATUS "Building Debug")
     vcpkg_execute_required_process(
         COMMAND cmd /c vcbuild.bat debug ${TRIPLET_SYSTEM_ARCH} shared
-        WORKING_DIRECTORY ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1
+        WORKING_DIRECTORY ${SOURCE_PATH}
         LOGNAME ${TARGET_TRIPLET}-build-dbg
     )
 else()
@@ -75,28 +76,28 @@ file(MAKE_DIRECTORY
     )
 
 file(COPY
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/include/tree.h
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/include/uv.h
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/include/uv-version.h
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/include/uv-errno.h
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/include/uv-threadpool.h
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/include/uv-win.h
+    ${SOURCE_PATH}/include/tree.h
+    ${SOURCE_PATH}/include/uv.h
+    ${SOURCE_PATH}/include/uv-version.h
+    ${SOURCE_PATH}/include/uv-errno.h
+    ${SOURCE_PATH}/include/uv-threadpool.h
+    ${SOURCE_PATH}/include/uv-win.h
     DESTINATION ${CURRENT_PACKAGES_DIR}/include)
 
 file(COPY
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/Debug/libuv.dll
+    ${SOURCE_PATH}/Debug/libuv.dll
     DESTINATION ${CURRENT_PACKAGES_DIR}/debug/bin)
 file(COPY
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/Debug/libuv.lib
+    ${SOURCE_PATH}/Debug/libuv.lib
     DESTINATION ${CURRENT_PACKAGES_DIR}/debug/lib)
 file(COPY
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/Release/libuv.dll
+    ${SOURCE_PATH}/Release/libuv.dll
     DESTINATION ${CURRENT_PACKAGES_DIR}/bin)
 file(COPY
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/Release/libuv.lib
+    ${SOURCE_PATH}/Release/libuv.lib
     DESTINATION ${CURRENT_PACKAGES_DIR}/lib)
 file(COPY
-    ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-src/libuv-1.9.1/LICENSE
+    ${SOURCE_PATH}/LICENSE
     DESTINATION ${CURRENT_PACKAGES_DIR}/share/libuv)
 
 file(RENAME
diff --git a/ports/libwebsockets/portfile.cmake b/ports/libwebsockets/portfile.cmake
index 7b8a2c918..3c0ee7ae1 100644
--- a/ports/libwebsockets/portfile.cmake
+++ b/ports/libwebsockets/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/libwebsockets-2.0.0)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/warmcat/libwebsockets/archive/v2.0.0.zip"
     FILENAME "libwebsockets-v2.0.0.zip"
@@ -7,7 +8,7 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/libwebsockets-2.0.0
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS
         -DLWS_WITH_STATIC=OFF
         -DLWS_USE_BUNDLED_ZLIB=OFF
@@ -30,6 +31,6 @@ file(RENAME
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/cmake)
 
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/libwebsockets-2.0.0/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/libwebsockets)
+file(COPY ${SOURCE_PATH}/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/libwebsockets)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/libwebsockets/LICENSE ${CURRENT_PACKAGES_DIR}/share/libwebsockets/copyright)
 vcpkg_copy_pdbs()
diff --git a/ports/mpg123/portfile.cmake b/ports/mpg123/portfile.cmake
index ac2e7e7ca..68d0f7baa 100644
--- a/ports/mpg123/portfile.cmake
+++ b/ports/mpg123/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3)
 vcpkg_download_distfile(ARCHIVE
     URLS "http://downloads.sourceforge.net/project/mpg123/mpg123/1.23.3/mpg123-1.23.3.tar.bz2"
     FILENAME "mpg123-1.23.3.tar.bz2"
@@ -11,44 +12,44 @@ get_filename_component(YASM_EXE_PATH ${YASM} DIRECTORY)
 set(ENV{PATH} "${YASM_EXE_PATH};$ENV{PATH}")
 
 vcpkg_apply_patches(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3
+    SOURCE_PATH ${SOURCE_PATH}
     PATCHES ${CMAKE_CURRENT_LIST_DIR}/0001-Modify-2010-libmpg123.vcxproj-to-use-VS-2015-along-w.patch
 )
 
 vcpkg_build_msbuild(
-    PROJECT_PATH ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3/ports/MSVC++/2010/libmpg123/libmpg123.vcxproj
+    PROJECT_PATH ${SOURCE_PATH}/ports/MSVC++/2010/libmpg123/libmpg123.vcxproj
     RELEASE_CONFIGURATION Release_x86_Dll
     DEBUG_CONFIGURATION Debug_x86_Dll
 )
 
 message(STATUS "Installing")
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3/ports/MSVC++/2010/libmpg123/Debug/libmpg123.dll
-    ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3/ports/MSVC++/2010/libmpg123/Debug/libmpg123.pdb
+    ${SOURCE_PATH}/ports/MSVC++/2010/libmpg123/Debug/libmpg123.dll
+    ${SOURCE_PATH}/ports/MSVC++/2010/libmpg123/Debug/libmpg123.pdb
     DESTINATION ${CURRENT_PACKAGES_DIR}/debug/bin
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3/ports/MSVC++/2010/libmpg123/Release/libmpg123.dll
-    ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3/ports/MSVC++/2010/libmpg123/Release/libmpg123.pdb
+    ${SOURCE_PATH}/ports/MSVC++/2010/libmpg123/Release/libmpg123.dll
+    ${SOURCE_PATH}/ports/MSVC++/2010/libmpg123/Release/libmpg123.pdb
     DESTINATION ${CURRENT_PACKAGES_DIR}/bin
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3/ports/MSVC++/2010/libmpg123/Debug/libmpg123.lib
+    ${SOURCE_PATH}/ports/MSVC++/2010/libmpg123/Debug/libmpg123.lib
     DESTINATION ${CURRENT_PACKAGES_DIR}/debug/lib
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3/ports/MSVC++/2010/libmpg123/Release/libmpg123.lib
+    ${SOURCE_PATH}/ports/MSVC++/2010/libmpg123/Release/libmpg123.lib
     DESTINATION ${CURRENT_PACKAGES_DIR}/lib
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3/ports/MSVC++/mpg123.h
+    ${SOURCE_PATH}/ports/MSVC++/mpg123.h
     DESTINATION ${CURRENT_PACKAGES_DIR}/include
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3/src/libmpg123/mpg123.h.in
+    ${SOURCE_PATH}/src/libmpg123/mpg123.h.in
     DESTINATION ${CURRENT_PACKAGES_DIR}/include
 )
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/mpg123-1.23.3/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/mpg123 RENAME copyright)
+file(INSTALL ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/mpg123 RENAME copyright)
 vcpkg_copy_pdbs()
 
 message(STATUS "Installing done")
diff --git a/ports/mpir/portfile.cmake b/ports/mpir/portfile.cmake
index ff1489291..e2f7040d6 100644
--- a/ports/mpir/portfile.cmake
+++ b/ports/mpir/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2)
 vcpkg_download_distfile(ARCHIVE_FILE
     URLS "http://mpir.org/mpir-2.7.2.tar.lz"
     FILENAME "mpir-2.7.2.tar.lz"
@@ -7,7 +8,7 @@ vcpkg_download_distfile(ARCHIVE_FILE
 vcpkg_extract_source_archive(${ARCHIVE_FILE})
 
 vcpkg_build_msbuild(
-    PROJECT_PATH ${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/build.vc14/dll_mpir_gc/dll_mpir_gc.vcxproj
+    PROJECT_PATH ${SOURCE_PATH}/build.vc14/dll_mpir_gc/dll_mpir_gc.vcxproj
 )
 
 IF (TRIPLET_SYSTEM_ARCH MATCHES "x86")
@@ -17,32 +18,32 @@ ELSE()
 ENDIF()
 
 file(INSTALL
-	${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/dll/${BUILD_ARCH}/Debug/gmp.h
-	${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/dll/${BUILD_ARCH}/Debug/gmpxx.h
-	${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/dll/${BUILD_ARCH}/Debug/mpir.h
-	${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/dll/${BUILD_ARCH}/Debug/mpirxx.h
+	${SOURCE_PATH}/dll/${BUILD_ARCH}/Debug/gmp.h
+	${SOURCE_PATH}/dll/${BUILD_ARCH}/Debug/gmpxx.h
+	${SOURCE_PATH}/dll/${BUILD_ARCH}/Debug/mpir.h
+	${SOURCE_PATH}/dll/${BUILD_ARCH}/Debug/mpirxx.h
     DESTINATION ${CURRENT_PACKAGES_DIR}/include
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/dll/${BUILD_ARCH}/Debug/mpir.dll
-	${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/dll/${BUILD_ARCH}/Debug/mpir.pdb
+    ${SOURCE_PATH}/dll/${BUILD_ARCH}/Debug/mpir.dll
+	${SOURCE_PATH}/dll/${BUILD_ARCH}/Debug/mpir.pdb
     DESTINATION ${CURRENT_PACKAGES_DIR}/debug/bin
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/dll/${BUILD_ARCH}/Release/mpir.dll
-	${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/dll/${BUILD_ARCH}/Release/mpir.pdb
+    ${SOURCE_PATH}/dll/${BUILD_ARCH}/Release/mpir.dll
+	${SOURCE_PATH}/dll/${BUILD_ARCH}/Release/mpir.pdb
     DESTINATION ${CURRENT_PACKAGES_DIR}/bin
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/dll/${BUILD_ARCH}/Debug/mpir.lib
+    ${SOURCE_PATH}/dll/${BUILD_ARCH}/Debug/mpir.lib
     DESTINATION ${CURRENT_PACKAGES_DIR}/debug/lib
 )
 file(INSTALL
-    ${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/dll/${BUILD_ARCH}/Release/mpir.lib
+    ${SOURCE_PATH}/dll/${BUILD_ARCH}/Release/mpir.lib
     DESTINATION ${CURRENT_PACKAGES_DIR}/lib
 )
 
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/mpir-2.7.2/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/mpir RENAME copyright)
+file(INSTALL ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/mpir RENAME copyright)
 
 vcpkg_copy_pdbs()
 message(STATUS "Installing done")
diff --git a/ports/openal-soft/portfile.cmake b/ports/openal-soft/portfile.cmake
index d80bc373c..1e9781fd3 100644
--- a/ports/openal-soft/portfile.cmake
+++ b/ports/openal-soft/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/openal-soft-1.17.2)
 vcpkg_download_distfile(ARCHIVE
     URLS "http://openal-soft.org/openal-releases/openal-soft-1.17.2.tar.bz2"
     FILENAME "openal-soft-1.17.2.tar.bz2"
@@ -8,7 +9,7 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/openal-soft-1.17.2
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS
         -DALSOFT_UTILS=OFF
         -DALSOFT_NO_CONFIG_UTIL=ON
@@ -22,7 +23,7 @@ vcpkg_build_cmake()
 vcpkg_install_cmake()
 
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/openal-soft-1.17.2/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/openal-soft)
+file(COPY ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/openal-soft)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/openal-soft/COPYING ${CURRENT_PACKAGES_DIR}/share/openal-soft/copyright)
 vcpkg_copy_pdbs()
 
diff --git a/ports/opencv/portfile.cmake b/ports/opencv/portfile.cmake
index ad6bd2a53..a40cc9e19 100644
--- a/ports/opencv/portfile.cmake
+++ b/ports/opencv/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/opencv-92387b1ef8fad15196dd5f7fb4931444a68bc93a)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/opencv/opencv/archive/92387b1ef8fad15196dd5f7fb4931444a68bc93a.zip"
     FILENAME "opencv-92387b1ef8fad15196dd5f7fb4931444a68bc93a.zip"
@@ -6,8 +7,6 @@ vcpkg_download_distfile(ARCHIVE
 )
 vcpkg_extract_source_archive(${ARCHIVE})
 
-set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/opencv-92387b1ef8fad15196dd5f7fb4931444a68bc93a)
-
 vcpkg_apply_patches(
     SOURCE_PATH ${SOURCE_PATH}
     PATCHES "${CMAKE_CURRENT_LIST_DIR}/opencv-installation-options.patch"
diff --git a/ports/openssl/portfile.cmake b/ports/openssl/portfile.cmake
index 345ec8e3b..9f45f0ce4 100644
--- a/ports/openssl/portfile.cmake
+++ b/ports/openssl/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/openssl-1.0.2h)
 vcpkg_find_acquire_program(PERL)
 find_program(NMAKE nmake)
 
@@ -11,10 +12,10 @@ vcpkg_download_distfile(OPENSSL_SOURCE_ARCHIVE
     SHA512 780601f6f3f32f42b6d7bbc4c593db39a3575f9db80294a10a68b2b0bb79448d9bd529ca700b9977354cbdfc65887c76af0aa7b90d3ee421f74ab53e6f15c303
 )
 
-file(COPY ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt DESTINATION ${CURRENT_BUILDTREES_DIR}/src/openssl-1.0.2h)
+file(COPY ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt DESTINATION ${SOURCE_PATH})
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/openssl-1.0.2h
+    SOURCE_PATH ${SOURCE_PATH}
     GENERATOR "NMake Makefiles"
     OPTIONS
         -DCURRENT_INSTALLED_DIR=${CURRENT_INSTALLED_DIR}
diff --git a/ports/range-v3/portfile.cmake b/ports/range-v3/portfile.cmake
index 4f547c2c8..692adf347 100644
--- a/ports/range-v3/portfile.cmake
+++ b/ports/range-v3/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/Range-V3-VS2015-ede9ad367fd5ec764fecb039c874614bd908e6b6)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/Microsoft/Range-V3-VS2015/archive/ede9ad367fd5ec764fecb039c874614bd908e6b6.zip"
     FILENAME "range-v3-ede9ad367fd5ec764fecb039c874614bd908e6b6.zip"
@@ -6,7 +7,7 @@ vcpkg_download_distfile(ARCHIVE
 )
 vcpkg_extract_source_archive(${ARCHIVE})
 
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/Range-V3-VS2015-ede9ad367fd5ec764fecb039c874614bd908e6b6/LICENSE.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/range-v3)
+file(COPY ${SOURCE_PATH}/LICENSE.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/range-v3)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/range-v3/LICENSE.txt ${CURRENT_PACKAGES_DIR}/share/range-v3/copyright)
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/Range-V3-VS2015-ede9ad367fd5ec764fecb039c874614bd908e6b6/include DESTINATION ${CURRENT_PACKAGES_DIR} FILES_MATCHING PATTERN "*.hpp")
+file(INSTALL ${SOURCE_PATH}/include DESTINATION ${CURRENT_PACKAGES_DIR} FILES_MATCHING PATTERN "*.hpp")
 vcpkg_copy_pdbs()
diff --git a/ports/rapidjson/portfile.cmake b/ports/rapidjson/portfile.cmake
index 53008daea..d907210d0 100644
--- a/ports/rapidjson/portfile.cmake
+++ b/ports/rapidjson/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+SET(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/rapidjson-879def80f2e466cdf4c86dc7e53ea2dd4cafaea0)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/miloyip/rapidjson/archive/879def80f2e466cdf4c86dc7e53ea2dd4cafaea0.zip"
     FILENAME "rapidjson-879def80f2e466cdf4c86dc7e53ea2dd4cafaea0.zip"
@@ -7,9 +8,9 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 # Put the licence file where vcpkg expects it
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/rapidjson-879def80f2e466cdf4c86dc7e53ea2dd4cafaea0/license.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/rapidjson)
+file(COPY ${SOURCE_PATH}/license.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/rapidjson)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/rapidjson/license.txt ${CURRENT_PACKAGES_DIR}/share/rapidjson/copyright)
 
 # Copy the rapidjson header files
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/rapidjson-879def80f2e466cdf4c86dc7e53ea2dd4cafaea0/include DESTINATION ${CURRENT_PACKAGES_DIR} FILES_MATCHING PATTERN "*.h")
+file(INSTALL ${SOURCE_PATH}/include DESTINATION ${CURRENT_PACKAGES_DIR} FILES_MATCHING PATTERN "*.h")
 vcpkg_copy_pdbs()
diff --git a/ports/rapidxml/portfile.cmake b/ports/rapidxml/portfile.cmake
index 9551e17a5..90dd06911 100644
--- a/ports/rapidxml/portfile.cmake
+++ b/ports/rapidxml/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/rapidxml-1.13)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://sourceforge.net/projects/rapidxml/files/rapidxml/rapidxml%201.13/rapidxml-1.13.zip/download"
     FILENAME "rapidxml-1.13.zip"
@@ -7,8 +8,8 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 # Handle copyright
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/rapidxml-1.13/license.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/rapidxml)
+file(COPY ${SOURCE_PATH}/license.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/rapidxml)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/rapidxml/license.txt ${CURRENT_PACKAGES_DIR}/share/rapidxml/copyright)
 
 # Copy the header files
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/rapidxml-1.13/ DESTINATION ${CURRENT_PACKAGES_DIR}/include FILES_MATCHING PATTERN "*.hpp")
+file(INSTALL ${SOURCE_PATH}/ DESTINATION ${CURRENT_PACKAGES_DIR}/include FILES_MATCHING PATTERN "*.hpp")
diff --git a/ports/sdl2/portfile.cmake b/ports/sdl2/portfile.cmake
index 0f0409160..73a1c3b12 100644
--- a/ports/sdl2/portfile.cmake
+++ b/ports/sdl2/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4)
 vcpkg_download_distfile(ARCHIVE_FILE
     URLS "http://libsdl.org/release/SDL2-2.0.4.tar.gz"
     FILENAME "SDL2-2.0.4.tar.gz"
@@ -8,27 +9,27 @@ vcpkg_extract_source_archive(${ARCHIVE_FILE})
 
 if(TRIPLET_SYSTEM_NAME MATCHES "WindowsStore")
     vcpkg_build_msbuild(
-        PROJECT_PATH ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4/VisualC-WinRT/UWP_VS2015/SDL-UWP.vcxproj
+        PROJECT_PATH ${SOURCE_PATH}/VisualC-WinRT/UWP_VS2015/SDL-UWP.vcxproj
     )
 
     file(COPY
-        ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4/VisualC-WinRT/UWP_VS2015/Debug/SDL-UWP/SDL2.dll
-        ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4/VisualC-WinRT/UWP_VS2015/Debug/SDL-UWP/SDL2.pdb
+        ${SOURCE_PATH}/VisualC-WinRT/UWP_VS2015/Debug/SDL-UWP/SDL2.dll
+        ${SOURCE_PATH}/VisualC-WinRT/UWP_VS2015/Debug/SDL-UWP/SDL2.pdb
         DESTINATION ${CURRENT_PACKAGES_DIR}/debug/bin)
     file(COPY
-        ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4/VisualC-WinRT/UWP_VS2015/Release/SDL-UWP/SDL2.dll
-        ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4/VisualC-WinRT/UWP_VS2015/Release/SDL-UWP/SDL2.pdb
+        ${SOURCE_PATH}/VisualC-WinRT/UWP_VS2015/Release/SDL-UWP/SDL2.dll
+        ${SOURCE_PATH}/VisualC-WinRT/UWP_VS2015/Release/SDL-UWP/SDL2.pdb
         DESTINATION ${CURRENT_PACKAGES_DIR}/bin)
-    file(COPY ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4/VisualC-WinRT/UWP_VS2015/Debug/SDL-UWP/SDL2.lib DESTINATION ${CURRENT_PACKAGES_DIR}/debug/lib)
-    file(COPY ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4/VisualC-WinRT/UWP_VS2015/Release/SDL-UWP/SDL2.lib DESTINATION ${CURRENT_PACKAGES_DIR}/lib)
+    file(COPY ${SOURCE_PATH}/VisualC-WinRT/UWP_VS2015/Debug/SDL-UWP/SDL2.lib DESTINATION ${CURRENT_PACKAGES_DIR}/debug/lib)
+    file(COPY ${SOURCE_PATH}/VisualC-WinRT/UWP_VS2015/Release/SDL-UWP/SDL2.lib DESTINATION ${CURRENT_PACKAGES_DIR}/lib)
 
     file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/include)
     file(MAKE_DIRECTORY ${CURRENT_PACKAGES_DIR}/include)
-    file(COPY ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4/include DESTINATION ${CURRENT_PACKAGES_DIR}/include)
+    file(COPY ${SOURCE_PATH}/include DESTINATION ${CURRENT_PACKAGES_DIR}/include)
     file(RENAME ${CURRENT_PACKAGES_DIR}/include/include ${CURRENT_PACKAGES_DIR}/include/SDL2)
 else()
     vcpkg_configure_cmake(
-        SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4
+        SOURCE_PATH ${SOURCE_PATH}
         OPTIONS
             -DSDL_STATIC=OFF
     )
@@ -39,5 +40,5 @@ else()
     file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
 endif()
 
-file(INSTALL ${CURRENT_BUILDTREES_DIR}/src/SDL2-2.0.4/COPYING.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/sdl2 RENAME copyright)
+file(INSTALL ${SOURCE_PATH}/COPYING.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/sdl2 RENAME copyright)
 vcpkg_copy_pdbs()
diff --git a/ports/sery/portfile.cmake b/ports/sery/portfile.cmake
index 94a236b85..d19fad1c5 100644
--- a/ports/sery/portfile.cmake
+++ b/ports/sery/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+SET(SOURCE_PATH "${CURRENT_BUILDTREES_DIR}/src/Sery-1.0")
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/Ninetainedo/Sery/archive/v1.0.zip"
     FILENAME "sery-1.0.0.zip"
@@ -6,10 +7,8 @@ vcpkg_download_distfile(ARCHIVE
 )
 vcpkg_extract_source_archive(${ARCHIVE})
 
-SET(SERY_ROOT_DIR "${CURRENT_BUILDTREES_DIR}/src/Sery-1.0")
-
 vcpkg_configure_cmake(
-    SOURCE_PATH ${SERY_ROOT_DIR}
+    SOURCE_PATH ${SOURCE_PATH}
     # OPTIONS -DUSE_THIS_IN_ALL_BUILDS=1 -DUSE_THIS_TOO=2
     # OPTIONS_RELEASE -DOPTIMIZE=1
     # OPTIONS_DEBUG -DDEBUGGABLE=1
@@ -23,7 +22,7 @@ file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/cmake)
 
 # Handle copyright
-file(COPY ${SERY_ROOT_DIR}/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/sery)
+file(COPY ${SOURCE_PATH}/LICENSE DESTINATION ${CURRENT_PACKAGES_DIR}/share/sery)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/sery/LICENSE ${CURRENT_PACKAGES_DIR}/share/sery/copyright)
 
 # Moves cmake files where appropriate
diff --git a/ports/sqlite3/portfile.cmake b/ports/sqlite3/portfile.cmake
index 75dfc73b5..314142924 100644
--- a/ports/sqlite3/portfile.cmake
+++ b/ports/sqlite3/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CMAKE_CURRENT_LIST_DIR})
 vcpkg_download_distfile(ARCHIVE
     URLS "http://www.sqlite.org/2016/sqlite-amalgamation-3120200.zip"
     FILENAME "sqlite-amalgamation-3120200.zip"
@@ -7,7 +8,7 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CMAKE_CURRENT_LIST_DIR}
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS
         -DSOURCE=${CURRENT_BUILDTREES_DIR}/src/sqlite-amalgamation-3120200
 )
diff --git a/ports/stb/portfile.cmake b/ports/stb/portfile.cmake
index 15414d0da..432d84604 100644
--- a/ports/stb/portfile.cmake
+++ b/ports/stb/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/stb-e713a69f1ea6ee1e0d55725ed0731520045a5993)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/nothings/stb/archive/e713a69f1ea6ee1e0d55725ed0731520045a5993.zip"
     FILENAME "stb-e713a69f1ea6ee1e0d55725ed0731520045a5993.zip"
@@ -7,10 +8,9 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 # Put the licence file where vcpkg expects it
-set(SOURCE_DIR ${CURRENT_BUILDTREES_DIR}/src/stb-e713a69f1ea6ee1e0d55725ed0731520045a5993)
-file(COPY ${SOURCE_DIR}/README.md DESTINATION ${CURRENT_PACKAGES_DIR}/share/stb/README.md)
+file(COPY ${SOURCE_PATH}/README.md DESTINATION ${CURRENT_PACKAGES_DIR}/share/stb/README.md)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/stb/README.md ${CURRENT_PACKAGES_DIR}/share/stb/copyright)
 
 # Copy the stb header files
-file(GLOB HEADER_FILES ${SOURCE_DIR}/*.h)
+file(GLOB HEADER_FILES ${SOURCE_PATH}/*.h)
 file(COPY ${HEADER_FILES} DESTINATION ${CURRENT_PACKAGES_DIR}/include)
diff --git a/ports/tiff/portfile.cmake b/ports/tiff/portfile.cmake
index ef770a2c5..4f6ef11de 100644
--- a/ports/tiff/portfile.cmake
+++ b/ports/tiff/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/tiff-4.0.6)
 vcpkg_download_distfile(ARCHIVE
     URLS "http://download.osgeo.org/libtiff/tiff-4.0.6.tar.gz"
     FILENAME "tiff-4.0.6.tar.gz"
@@ -7,7 +8,7 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/tiff-4.0.6
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS -Dcxx=OFF
 )
 
@@ -20,7 +21,7 @@ file(REMOVE_RECURSE
     ${CURRENT_PACKAGES_DIR}/share
 )
 file(COPY
-    ${CURRENT_BUILDTREES_DIR}/src/tiff-4.0.6/COPYRIGHT
+    ${SOURCE_PATH}/COPYRIGHT
     DESTINATION ${CURRENT_PACKAGES_DIR}/share/tiff
 )
 file(RENAME
diff --git a/ports/tinyxml2/portfile.cmake b/ports/tinyxml2/portfile.cmake
index 3e29b857c..3cb7b4338 100644
--- a/ports/tinyxml2/portfile.cmake
+++ b/ports/tinyxml2/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/tinyxml2-3.0.0)
 vcpkg_download_distfile(ARCHIVE
     URLS "https://github.com/leethomason/tinyxml2/archive/3.0.0.zip"
     FILENAME "tinyxml2-3.0.0.zip"
@@ -7,7 +8,7 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(${ARCHIVE})
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/tinyxml2-3.0.0
+    SOURCE_PATH ${SOURCE_PATH}
     # OPTIONS -DUSE_THIS_IN_ALL_BUILDS=1
     # OPTIONS_RELEASE -DOPTIMIZE=1
     # OPTIONS_DEBUG -DDEBUGGABLE=1
@@ -17,6 +18,6 @@ vcpkg_build_cmake()
 vcpkg_install_cmake()
 
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
-file(COPY ${CURRENT_BUILDTREES_DIR}/src/tinyxml2-3.0.0/readme.md DESTINATION ${CURRENT_PACKAGES_DIR}/share/tinyxml2)
+file(COPY ${SOURCE_PATH}/readme.md DESTINATION ${CURRENT_PACKAGES_DIR}/share/tinyxml2)
 file(RENAME ${CURRENT_PACKAGES_DIR}/share/tinyxml2/readme.md ${CURRENT_PACKAGES_DIR}/share/tinyxml2/copyright)
 vcpkg_copy_pdbs()
diff --git a/ports/zlib/portfile.cmake b/ports/zlib/portfile.cmake
index 82c5caded..ad95b6436 100644
--- a/ports/zlib/portfile.cmake
+++ b/ports/zlib/portfile.cmake
@@ -1,4 +1,5 @@
 include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/zlib-1.2.8)
 vcpkg_download_distfile(ARCHIVE_FILE
     URLS "http://zlib.net/zlib128.zip"
     FILENAME "zlib128.zip"
@@ -7,7 +8,7 @@ vcpkg_download_distfile(ARCHIVE_FILE
 vcpkg_extract_source_archive(${ARCHIVE_FILE})
 
 vcpkg_configure_cmake(
-    SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/zlib-1.2.8
+    SOURCE_PATH ${SOURCE_PATH}
     OPTIONS
         -DSKIP_INSTALL_FILES=ON
     OPTIONS_DEBUG