VM builds: Use 9p/virtfs instead of CIFS

9p (with caching enabled) is much faster than CIFS and doesn't require
Samba or virtual networking.  For instance, building GNU Hello with
CIFS takes ~323s on my laptop, but with 9p it takes 54s.

More measurements will be needed to see if "cache=fscache" is really
faster than "cache=loose" (the former seems to be a little bit
faster).

1 files changed, 7 insertions, 3 deletions

diff --git a/pkgs/build-support/vm/test.nix b/pkgs/build-support/vm/test.nix
index eed7cd017c44a..798c283a17747 100644
--- a/pkgs/build-support/vm/test.nix
+++ b/pkgs/build-support/vm/test.nix
@@ -7,6 +7,10 @@ rec {
   # Run the PatchELF derivation in a VM.
   buildPatchelfInVM = runInLinuxVM patchelf;
 
+  buildHelloInVM = runInLinuxVM hello;
+
+  buildPanInVM = runInLinuxVM pan;
+
 
   testRPMImage = makeImageTestScript diskImages.fedora16x86_64;
 
@@ -17,10 +21,10 @@ rec {
     diskImage = diskImages.fedora16x86_64;
   };
 
-  
+
   testUbuntuImage = makeImageTestScript diskImages.ubuntu810i386;
 
-  
+
   buildInDebian = runInLinuxImage (stdenv.mkDerivation {
     name = "deb-compile";
     src = patchelf.src;
@@ -65,6 +69,6 @@ rec {
       make install
     '';
   };
-*/  
+*/
 
 }