* Don't replace /opt if it's followed by something other than

whitespace or a /, otherwise strings such as /foo/opticaldrive.c
  will be broken.

svn path=/nixpkgs/branches/stdenv-updates/; revision=31793

pkgs/development/tools/build-managers/cmake/setup-hook.sh

@@ -3,10 +3,11 @@ addCMakeParams() {
 }
 
 fixCmakeFiles() {
+    # Replace occurences of /usr and /opt by /var/empty.
     echo "fixing cmake files..."
     find "$1" \( -type f -name "*.cmake" -o -name "*.cmake.in" -o -name CMakeLists.txt \) -print |
         while read fn; do
-            sed -e 's|/usr|/var/empty|g' -e 's|/opt|/var/empty|g' < "$fn" > "$fn.tmp"
+            sed -e 's^/usr\([ /]\|$\)^/var/empty\1^g' -e 's^/opt\([ /]\|$\)^/var/empty\1^g' < "$fn" > "$fn.tmp"
             mv "$fn.tmp" "$fn"
         done
 }