diff --git a/browser/config/mozconfigs/linux32/debug-asan b/browser/config/mozconfigs/linux32/debug-asan
index 34e6f9995376..4766ce2fe701 100644
--- a/browser/config/mozconfigs/linux32/debug-asan
+++ b/browser/config/mozconfigs/linux32/debug-asan
@@ -14,4 +14,7 @@ ac_add_options --enable-stdcxx-compat
 # Package js shell.
 export MOZ_PACKAGE_JSSHELL=1
 
+# Need this to prevent name conflicts with the normal nightly build packages
+export MOZ_PKG_SPECIAL=asan
+
 . "$topsrcdir/build/mozconfig.common.override"
diff --git a/browser/config/mozconfigs/linux32/nightly-asan b/browser/config/mozconfigs/linux32/nightly-asan
index da5a39d41932..c67f0658445b 100644
--- a/browser/config/mozconfigs/linux32/nightly-asan
+++ b/browser/config/mozconfigs/linux32/nightly-asan
@@ -16,4 +16,7 @@ ac_add_options --enable-stdcxx-compat
 # Package js shell.
 export MOZ_PACKAGE_JSSHELL=1
 
+# Need this to prevent name conflicts with the normal nightly build packages
+export MOZ_PKG_SPECIAL=asan
+
 . "$topsrcdir/build/mozconfig.common.override"
diff --git a/browser/config/mozconfigs/linux64/debug-asan b/browser/config/mozconfigs/linux64/debug-asan
index 34e6f9995376..4766ce2fe701 100644
--- a/browser/config/mozconfigs/linux64/debug-asan
+++ b/browser/config/mozconfigs/linux64/debug-asan
@@ -14,4 +14,7 @@ ac_add_options --enable-stdcxx-compat
 # Package js shell.
 export MOZ_PACKAGE_JSSHELL=1
 
+# Need this to prevent name conflicts with the normal nightly build packages
+export MOZ_PKG_SPECIAL=asan
+
 . "$topsrcdir/build/mozconfig.common.override"
diff --git a/browser/config/mozconfigs/linux64/nightly-asan b/browser/config/mozconfigs/linux64/nightly-asan
index da5a39d41932..c67f0658445b 100644
--- a/browser/config/mozconfigs/linux64/nightly-asan
+++ b/browser/config/mozconfigs/linux64/nightly-asan
@@ -16,4 +16,7 @@ ac_add_options --enable-stdcxx-compat
 # Package js shell.
 export MOZ_PACKAGE_JSSHELL=1
 
+# Need this to prevent name conflicts with the normal nightly build packages
+export MOZ_PKG_SPECIAL=asan
+
 . "$topsrcdir/build/mozconfig.common.override"
diff --git a/browser/config/mozconfigs/macosx64/debug-asan b/browser/config/mozconfigs/macosx64/debug-asan
index 846615c64fd8..97ced38c45f5 100644
--- a/browser/config/mozconfigs/macosx64/debug-asan
+++ b/browser/config/mozconfigs/macosx64/debug-asan
@@ -10,4 +10,7 @@ export MOZ_PACKAGE_JSSHELL=1
 
 ac_add_options --with-macbundlename-prefix=Firefox
 
+# Need this to prevent name conflicts with the normal nightly build packages
+export MOZ_PKG_SPECIAL=asan
+
 . "$topsrcdir/build/mozconfig.common.override"