diff --git a/build.sh b/build.sh
index 8be9634..9327b2f 100755
--- a/build.sh
+++ b/build.sh
@@ -117,7 +117,7 @@ build() {
 		BUILD_NFAIL=0 BUILD_NFINI=0 BUILD_NSKIP=0 BUILD_PKGS_FAILED="" BUILD_TARGET="" BUILD_USER=""		\
 		DEFAULT_BUILD_CPUS=1 DEFAULT_BUILD_LAST_FAILED_PKG_FNAME="" DEFAULT_BUILD_LOG_FNAME=""			\
 		DEFAULT_BUILD_STEPS="" DEFAULT_BUILD_VARS="" DEFAULT_CLEAR_PREFIX_PATHS="" DEFAULT_GIT_ARGS=""		\
-		DEFAULT_GITROOT_HEAD="" DEFAULT_LOG_ENV_VARS="" DEFAULT_TARGET="" DEFAULT_WGET_ARGS=""			\
+		DEFAULT_GITROOT_HEAD DEFAULT_LOG_ENV_VARS="" DEFAULT_TARGET="" DEFAULT_WGET_ARGS=""			\
 		MIDIPIX_BUILD_PWD=""; DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME=""; EX_PKG_DISPATCH_WAIT="";
 	if ! . "${0%/*}/subr/build_init.subr"; then
 		_rc=1; printf "Error: failed to source \`${0%/*}/subr/build_init.subr'." >&2;