diff --git a/pkgs/development/libraries/opencascade/default.nix b/pkgs/development/libraries/opencascade/default.nix
index de3b9f32cf38..2f178edccd5e 100644
--- a/pkgs/development/libraries/opencascade/default.nix
+++ b/pkgs/development/libraries/opencascade/default.nix
@@ -1,6 +1,6 @@
 {stdenv, fetchurl, mesa, qt4, tcl, tk}:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "opencascade-6.3.0";
   src = fetchurl {
     url = http://files.opencascade.com/OCC_6.3_release/OpenCASCADE_src.tgz;
@@ -11,6 +11,12 @@ stdenv.mkDerivation {
 
   preConfigure = "cd ros";
 
+  postInstall = ''
+    mv $out/inc $out/include
+    ensureDir $out/share/doc/${name}
+    cp -R ../doc $out/share/doc/${name}
+  '';
+
   meta = {
     description = "Open CASCADE Technology, libraries for 3D modeling and numerical simulation";
     homepage = http://www.opencascade.org/;