* For some reason Samba insists on setting the g+w bit on newly

created directories, which is a security risk.  So create $out with
  the proper permissions before starting the VM.

svn path=/nixpkgs/trunk/; revision=27095

pkgs/build-support/vm/default.nix

@@ -274,6 +274,8 @@ rec {
     ${qemuCommand}
     EOF
 
+    mkdir -p -m 0700 $out
+
     chmod +x ./run-vm
     source ./run-vm