diff --git a/pkgs/servers/slimserver/default.nix b/pkgs/servers/slimserver/default.nix
index 85ee49fa7bc..78c0270589d 100644
--- a/pkgs/servers/slimserver/default.nix
+++ b/pkgs/servers/slimserver/default.nix
@@ -33,6 +33,8 @@ stdenv.mkDerivation rec {
   ];
 
   buildPhase = ''
+    rm -Rf CPAN
+    rm -Rf Bin
   '';
 
   installPhase = ''