diff --git a/pkgs/development/tools/casperjs/default.nix b/pkgs/development/tools/casperjs/default.nix
index a4b9f23c5eb9..4485e678ab50 100644
--- a/pkgs/development/tools/casperjs/default.nix
+++ b/pkgs/development/tools/casperjs/default.nix
@@ -28,9 +28,8 @@ in stdenv.mkDerivation rec {
     make test
   '';
 
-
   installPhase = ''
-    mv $PWD $out
+    cp -r . $out
   '';
 
   meta = {