{ stdenv, fetchurl, tk }: stdenv.mkDerivation rec { name = "gocr-0.49"; src = fetchurl { url = http://www-e.uni-magdeburg.de/jschulen/ocr/gocr-0.49.tar.gz; sha256 = "06hpzp7rkkwfr1fvmc8kcfz9v490i9yir7f7imh13gmka0fr6afc"; }; postInstall = '' sed -i -e 's|exec wish|exec ${tk}/bin/wish|' $out/bin/gocr.tcl ''; meta = { homepage = "http://jocr.sourceforge.net/"; description = "GPL Optical Character Recognition"; license = "GPLv2"; platforms = stdenv.lib.platforms.linux; maintainers = [ stdenv.lib.maintainers.simons ]; }; }