diff --git a/srcpkgs/firefox/patches/firefox-install-dir.patch b/srcpkgs/firefox/patches/firefox-install-dir.patch
index 821c210d5c3..0f2cc185c9f 100644
--- a/srcpkgs/firefox/patches/firefox-install-dir.patch
+++ b/srcpkgs/firefox/patches/firefox-install-dir.patch
@@ -1,8 +1,8 @@
---- config/baseconfig.mk	2012-10-09 07:34:41.762092280 +0000
-+++ config/baseconfig.mk	2012-10-09 07:40:53.052771576 +0000
-@@ -1,9 +1,9 @@
- INCLUDED_AUTOCONF_MK = 1
- 
+diff --git i/config/baseconfig.mk w/config/baseconfig.mk
+index 50f4cd4..1e7c1f2 100644
+--- config/baseconfig.mk
++++ config/baseconfig.mk
+@@ -1,7 +1,7 @@
 -includedir := $(includedir)/$(MOZ_APP_NAME)-$(MOZ_APP_VERSION)
 -idldir = $(datadir)/idl/$(MOZ_APP_NAME)-$(MOZ_APP_VERSION)
 -installdir = $(libdir)/$(MOZ_APP_NAME)-$(MOZ_APP_VERSION)
@@ -14,11 +14,11 @@
  DIST = $(DEPTH)/dist
  
  # We do magic with OBJ_SUFFIX in config.mk, the following ensures we don't
---- js/src/config/baseconfig.mk	2012-10-09 07:34:58.411973276 +0000
-+++ js/src/config/baseconfig.mk	2012-10-09 07:39:55.143186168 +0000
-@@ -1,7 +1,7 @@
- INCLUDED_AUTOCONF_MK = 1
- 
+diff --git i/js/src/config/baseconfig.mk w/js/src/config/baseconfig.mk
+index 1ff076c..5386569 100644
+--- js/src/config/baseconfig.mk
++++ js/src/config/baseconfig.mk
+@@ -1,5 +1,5 @@
 -installdir = $(libdir)/$(MOZ_APP_NAME)-$(MOZ_APP_VERSION)
 -sdkdir = $(libdir)/$(MOZ_APP_NAME)-devel-$(MOZ_APP_VERSION)
 +installdir = $(libdir)/$(MOZ_APP_NAME)