Subject: Prevent "-dirty" from being erroneously added to the version

diff --git a/src/Makefile.am b/src/Makefile.am
index d36d1a3..00048fc 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -28,7 +28,7 @@ always:
 # Always rebuild because .git/HEAD is a symbolic ref one can't depend on
 StellarCoreVersion.h: always
 	@vers=$$(cd "$(srcdir)" \
-		&& git describe --always --dirty --tags 2>/dev/null \
+		&& git describe --always --tags 2>/dev/null \
 		|| echo "$(PACKAGE) $(VERSION)"); \
 	    echo "#define STELLAR_CORE_VERSION \"$$vers\"" > $@~
 	@if cmp -s $@~ $@; then rm -f $@~; else \