diff --git a/pkgs/build-support/fetchgx/default.nix b/pkgs/build-support/fetchgx/default.nix
index c72bbec6632..6d209cec254 100644
--- a/pkgs/build-support/fetchgx/default.nix
+++ b/pkgs/build-support/fetchgx/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
 
   buildPhase = ''
     export GOPATH=$(pwd)/vendor
-    mkdir vendor
+    mkdir -p vendor
     gx install
   '';