anchor.diff:                       --set GITPERLLIB "$gitperllib"   \
                        --prefix PATH : "${svn}/bin" ''
          else '' # replace git-svn by notification script
  -        notSupported $out/libexec/git-core/git-svn "reinstall with config git = { svnSupport = true } set"
  +        notSupported $out/libexec/git-core/git-svn
          '')
   
      + (if sendEmailSupport then
  
positive.code:   postInstall =
      ''
        notSupported() {
          echo -e "#\!/bin/sh\necho '`basename $1` not supported, $2'\nexit 1" > "$1"
          chmod +x $1
        }
  
        # Install git-subtree.
  
negative.code:      '' else ''
         # Don't wrap Tcl/Tk, replace them by notification scripts
         for prog in bin/gitk libexec/git-core/git-gui; do
           notSupported "$out/$prog"
         done
       '');
  
  