diff --git a/local/pkgs/12to11/default.nix b/local/pkgs/12to11/default.nix
new file mode 100644
index 00000000..19f188e4
--- /dev/null
+++ b/local/pkgs/12to11/default.nix
@@ -0,0 +1,29 @@
+{
+  lib, stdenv, fetchsvn, xorg, libdrm
+}:
+
+stdenv.mkDerivation rec
+{
+  pname = "12to11";
+  version = "193";
+  src = fetchsvn
+  {
+    url = "svn://svn.code.sf.net/p/twelveto11/code";
+    rev = version;
+    sha256 = "12csy55f2xxj03c5b60dvip68mz8cggic6751y3hvj22ar4ncaaj";
+  };
+  postPatch =
+  ''
+    for i in *.c
+    do
+      sed -i -e "s|#include <drm_fourcc.h>|#include <libdrm/drm_fourcc.h>|" $i
+    done
+    for i in tests/*.c
+    do
+      sed -i -e "s|#include <drm/drm_fourcc.h>|#include <libdrm/drm_fourcc.h>|" $i
+    done
+  '';
+
+  nativeBuildInputs = [  ];
+  buildInputs = [ xorg.imake libdrm.dev ];
+}
diff --git a/local/pkgs/default.nix b/local/pkgs/default.nix
index 808e4317..30206b97 100644
--- a/local/pkgs/default.nix
+++ b/local/pkgs/default.nix
@@ -18,4 +18,5 @@
   # };
   vasp = callPackage ./vasp { openmp = llvmPackages.openmp; };
   vaspkit = callPackage ./vaspkit { attrsToList = (import ../lib lib).attrsToList; };
+  # "12to11" = callPackage ./12to11 {};
 }