{
  stdenv
, fig
}:
  stdenv.mkDerivation {
    name = "report";
    src = ./.;
    buildPhase = ''
      grep -o '@[^ @]*@' report.tex | sed 's/@//g' | sort -u > list

      echo "fig:" > fun.nix
      echo "'''" >> fun.nix
      sed 's:\(^.*\)$:sed -i "s;@\1@;''${\1};g" report.tex:g' list >> fun.nix
      echo "'''" >> fun.nix
    '';
    installPhase = ''
      cp fun.nix $out
    '';
  }