diff --git a/mozilla/config/make-jars.pl b/mozilla/config/make-jars.pl
index b62d6ac5fb0..aef52810d9f 100644
--- a/mozilla/config/make-jars.pl
+++ b/mozilla/config/make-jars.pl
@@ -1,6 +1,6 @@
 #!/perl
 
-# make-jars [-f] [-v] [-l] [-x] [-d <chromeDir>] [-s <srcdir>] [-z zipprog] [-o operating-system] < <jar.mn>
+# make-jars [-f] [-v] [-l] [-x] [-d <chromeDir>] [-s <srcdir>] [-t <topsrcdir>] [-z zipprog] [-o operating-system] < <jar.mn>
 
 my $cygwin_mountprefix = "";
 if ($^O eq "cygwin") {
@@ -48,13 +48,18 @@ foreach my $arg (@ARGV) {
 }
 my $defines = join(' ', @ARGV[ $ddindex .. $#ARGV ]);
 
-getopts("d:s:f:avlD:o:p:xz:");
+getopts("d:s:t:f:avlD:o:p:xz:");
 
 my $baseFilesDir = ".";
 if (defined($::opt_s)) {
     $baseFilesDir = $::opt_s;
 }
 
+my $topSrcDir;
+if (defined($::opt_t)) {
+    $topSrcDir = $::opt_t;
+}
+
 my $maxCmdline = 4000;
 if ($Config{'archname'} =~ /VMS/) {
     $maxCmdline = 200;
@@ -360,7 +365,10 @@ sub EnsureFileInDir
 
     my $src = $srcFile;
     if (defined($src)) {
-        if (! -e $src ) {
+        if ($src =~ m|^/|) {
+            # "absolute" patch from topSrcDir
+            $src = $topSrcDir.$srcFile;
+        } elsif (! -e $src ) {
             $src = "$srcPath/$srcFile";
         }
     }
diff --git a/mozilla/config/rules.mk b/mozilla/config/rules.mk
index e0cdee3a24a..9f9403fa1dc 100644
--- a/mozilla/config/rules.mk
+++ b/mozilla/config/rules.mk
@@ -1511,7 +1511,7 @@ ifndef NO_DIST_INSTALL
 	    $(if $(filter gtk gtk2 xlib,$(MOZ_WIDGET_TOOLKIT)),-x) \
 	    $(if $(CROSS_COMPILE),-o $(OS_ARCH)) $(_NO_FLOCK) $(_JAR_AUTO_REG) \
 	    -f $(MOZ_CHROME_FILE_FORMAT) -d $(DIST)/bin/chrome \
-	    -s $(srcdir) -z $(ZIP) -p $(MOZILLA_DIR)/config/preprocessor.pl -- \
+	    -s $(srcdir) -t $(topsrcdir) -z $(ZIP) -p $(MOZILLA_DIR)/config/preprocessor.pl -- \
 	    "$(DEFINES) $(ACDEFINES)"; \
 	  $(PERL) -I$(MOZILLA_DIR)/config $(MOZILLA_DIR)/config/make-chromelist.pl \
 	    $(DIST)/bin/chrome $(JAR_MANIFEST) $(_NO_FLOCK); \
@@ -1528,7 +1528,7 @@ ifndef NO_INSTALL
 	    $(if $(filter gtk gtk2 xlib,$(MOZ_WIDGET_TOOLKIT)),-x) \
 	    $(if $(CROSS_COMPILE),-o $(OS_ARCH)) $(_NO_FLOCK) $(_JAR_AUTO_REG) \
 	    -f $(MOZ_CHROME_FILE_FORMAT) -d $(DESTDIR)$(mozappdir)/chrome \
-	    -s $(srcdir) -z $(ZIP) -p $(MOZILLA_DIR)/config/preprocessor.pl -- \
+	    -s $(srcdir) -t $(topsrcdir) -z $(ZIP) -p $(MOZILLA_DIR)/config/preprocessor.pl -- \
 	    "$(DEFINES) $(ACDEFINES)"; \
 	  $(PERL) -I$(MOZILLA_DIR)/config $(MOZILLA_DIR)/config/make-chromelist.pl \
 	    $(DESTDIR)$(mozappdir)/chrome $(JAR_MANIFEST) $(_NO_FLOCK); \