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-rw-r--r--src/xulapp.mk.in2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/xulapp.mk.in b/src/xulapp.mk.in
index 8709b17..87ad39d 100644
--- a/src/xulapp.mk.in
+++ b/src/xulapp.mk.in
@@ -19,7 +19,7 @@
#####################################################################
-XUL_VERSION := $(shell xulrunner-1.9 --gre-version)
+XUL_VERSION ?= $(shell xulrunner-1.9 --gre-version)
pre-build:: build-system.stamp