diff --git a/browser/base/Makefile.in b/browser/base/Makefile.in
index 9315f2a50f42..0031e91c7588 100644
--- a/browser/base/Makefile.in
+++ b/browser/base/Makefile.in
@@ -62,8 +62,7 @@ EXTRA_JS_MODULES = \
 
 include $(topsrcdir)/config/rules.mk
 
-PRE_RELEASE_SUFFIX := $(shell $(PYTHON) $(topsrcdir)/config/printprereleasesuffix.py \
-                        $(shell cat $(srcdir)/../config/version.txt))
+PRE_RELEASE_SUFFIX := ""
 
 DEFINES += \
 	-DMOZ_APP_VERSION=$(MOZ_APP_VERSION) \
diff --git a/browser/installer/windows/Makefile.in b/browser/installer/windows/Makefile.in
index 2cad3d917699..7e41aea1bbaf 100644
--- a/browser/installer/windows/Makefile.in
+++ b/browser/installer/windows/Makefile.in
@@ -51,7 +51,7 @@ CONFIG_DIR = instgen
 SFX_MODULE = $(topsrcdir)/other-licenses/7zstub/firefox/7zSD.sfx
 APP_VERSION := $(shell cat $(srcdir)/../../config/version.txt)
 DEFINES += -DAPP_VERSION=$(APP_VERSION)
-PRE_RELEASE_SUFFIX := $(shell $(PYTHON) $(topsrcdir)/config/printprereleasesuffix.py $(APP_VERSION))
+PRE_RELEASE_SUFFIX := ""
 DEFINES += -DPRE_RELEASE_SUFFIX="$(PRE_RELEASE_SUFFIX)"
 
 INSTALLER_FILES = \
diff --git a/toolkit/mozapps/installer/package-name.mk b/toolkit/mozapps/installer/package-name.mk
index e25835a017ba..5b9870ce1519 100644
--- a/toolkit/mozapps/installer/package-name.mk
+++ b/toolkit/mozapps/installer/package-name.mk
@@ -112,10 +112,7 @@ MOZ_PKG_APPNAME_LC = $(shell echo $(MOZ_PKG_APPNAME) | tr '[A-Z]' '[a-z]')
 
 
 ifndef MOZ_PKG_LONGVERSION
-MOZ_PKG_LONGVERSION = $(shell echo $(MOZ_PKG_VERSION) |\
-                       sed -e 's/a\([0-9][0-9]*\)$$/ Alpha \1/' |\
-                       sed -e 's/b\([0-9][0-9]*\)$$/ Beta \1/' |\
-                       sed -e 's/rc\([0-9][0-9]*\)$$/ RC \1/')
+MOZ_PKG_LONGVERSION = $(shell echo $(MOZ_PKG_VERSION))
 endif
 
 ifeq (,$(filter-out Darwin OS2, $(OS_ARCH))) # Mac and OS2