diff --git a/.build/vendor-build.sh b/.build/vendor-build.sh
index a9241ac43..dd1fcecbd 100755
--- a/.build/vendor-build.sh
+++ b/.build/vendor-build.sh
@@ -17,10 +17,14 @@ if [[ ! -d vendor ]]; then
 fi
 
 function die() {
-	echo "$1"
+	echo "$1" >&2
 	exit 1
 }
 
+function abspath() {
+	(cd "$1" || die "Directory $1 does not exist"; pwd)
+}
+
 # findGlideLock dir looks for glide.lock in dir or any of its parent
 # directories.
 #
@@ -35,7 +39,7 @@ function findGlideLock() {
 		return
 	fi
 
-	findGlideLock "$(realpath --no-symlinks "$1/..")"
+	findGlideLock "$(abspath "$1/..")"
 }
 
 outputDir="$1"