diff --git a/ci/lib.sh b/ci/lib.sh
index 3ecbf147db..42a2b6a318 100755
--- a/ci/lib.sh
+++ b/ci/lib.sh
@@ -231,6 +231,10 @@ then
 	distro=$(echo "$CI_JOB_IMAGE" | tr : -)
 elif test true = "$GITLAB_CI"
 then
+	# This environment is multiple kB in size and may cause us to exceed
+	# xargs(1) limits on Windows.
+	unset GITLAB_FEATURES
+
 	CI_TYPE=gitlab-ci
 	CI_BRANCH="$CI_COMMIT_REF_NAME"
 	CI_COMMIT="$CI_COMMIT_SHA"