diff --git a/hack/build b/hack/build
index f8cac9889845..5487230d6d15 100755
--- a/hack/build
+++ b/hack/build
@@ -8,7 +8,12 @@ set -e
 : "${REVISION=$(./hack/git-meta revision)}"
 : "${PRERELEASE=$(./hack/git-meta version | rev | cut -c3- | rev | cut -d'-' -f 2 | grep -E '(^tp|^rc).*')}"
 : "${REVISION_NUMBER=1}"
-VERSION=$(printf "v%sm%s%s" "$(./hack/git-meta version | rev | cut -c3- | rev | cut -d'-' -f 1 | cut -c2-)" "${REVISION_NUMBER}" "-${PRERELEASE}")
+
+if [ -n "$PRERELEASE" ]; then
+  PRERELEASE="-$PRERELEASE"
+fi
+
+VERSION=$(printf "v%sm%s%s" "$(./hack/git-meta version | rev | cut -c3- | rev | cut -d'-' -f 1 | cut -c2-)" "${REVISION_NUMBER}" "${PRERELEASE}")
 
 : "${CGO_ENABLED=0}"
 : "${GO_PKG=github.com/docker/buildx}"
diff --git a/tests/version.go b/tests/version.go
index da3cfdbf6e7a..a18a1796a244 100644
--- a/tests/version.go
+++ b/tests/version.go
@@ -45,8 +45,8 @@ func testVersion(t *testing.T, sb integration.Sandbox) {
 	// This defaults to something that's still compatible
 	// with semver.
 	version := fields[1]
-	regex, err := regexp.CompilePOSIX("^v[0-9]+.[0-9]+.[0-9]+(m[0-9]+|m[0-9]+-rc[0-9]+|m[0-9]+-tp[0-9]+)$")
-	require.True(t, err == nil && regex.MatchString(version), "Second field was not valid: %+v", version)
+	regex := regexp.MustCompilePOSIX("^v[0-9]+.[0-9]+.[0-9]+(m[0-9]+|m[0-9]+-rc[0-9]+|m[0-9]+-tp[0-9]+)$")
+	require.True(t, regex.MatchString(version), "Second field was not valid: %+v", version)
 
 	// Revision should be empty or should look like a git hash.
 	if len(fields) > 2 && len(fields[2]) > 0 {