diff --git a/packaging/windows/mxe-based-build.sh b/packaging/windows/mxe-based-build.sh
index 3a9380767..3bc37a3a7 100755
--- a/packaging/windows/mxe-based-build.sh
+++ b/packaging/windows/mxe-based-build.sh
@@ -177,9 +177,9 @@ if [ "$MXEBUILDTYPE" = "x86_64-w64-mingw32.shared" ] ; then
 fi
 
 cd "$BUILDDIR"
-CURRENT_SHA=$(cd "$BASEDIR"/subsurface/libdivecomputer ; git describe --always --long)
+CURRENT_SHA=$(cd "$BASEDIR"/subsurface/libdivecomputer ; git describe --always --long --dirty)
 PREVIOUS_SHA=$(cat "libdivecomputer.SHA" 2>/dev/null || echo)
-if [ ! "$CURRENT_SHA" = "$PREVIOUS_SHA" ] || [ ! -d libdivecomputer ] || [ -f build.libdivecomputer ] ; then
+if [ ! "$CURRENT_SHA" = "$PREVIOUS_SHA" ] || [[ "$CURRENT_SHA" == *-dirty ]] || [ ! -d libdivecomputer ] || [ -f build.libdivecomputer ] ; then
 	rm -f build.libdivecomputer
 	mkdir -p libdivecomputer
 	cd libdivecomputer