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-rw-r--r--Makefile.am1
1 files changed, 1 insertions, 0 deletions
diff --git a/Makefile.am b/Makefile.am
index c86bf42..efaae8e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -8,4 +8,5 @@ EXTRA_DIST = \
git-version-gen
dist-hook:
+ @if ! git diff --quiet; then echo "Uncommitted changes present; not releasing"; exit 1; fi
echo $(VERSION) > $(distdir)/.tarball-version