diff --git a/docker-build-centos.sh b/docker-build-centos.sh
index 6a6efd4..9e3aa43 100755
--- a/docker-build-centos.sh
+++ b/docker-build-centos.sh
@@ -4,7 +4,7 @@ OUTPUT_DIR=$PWD
 
 SOURCE_DIR=$(readlink -f $(dirname ${BASH_SOURCE[0]}))
 
-VERSION=$(cd "$SOURCE_DIR" && git describe --tags --abbrev=8 --dirty)
+VERSION=$(cd "$SOURCE_DIR" && git describe --tags --abbrev=8 --dirty | tr - .)
 
 docker run --rm -i -v $SOURCE_DIR:/root/rpmbuild/SOURCES/laminar-$VERSION:ro -v $OUTPUT_DIR:/output centos:7 bash -xe <<EOS