anchor.diff: -{ stdenv
  -, lib
  +{ lib
  +, stdenv
  +, cairo
  +, curl
  +, fetchurl
  +, freealut
  +, gdk-pixbuf
   , git
  -, curl
  -, makeWrapper
  -, runtimeShell
  -, fetchurl
  -, unzip
  -, runCommand
  -, writeScriptBin
  +, glib
  +, gnome2
  +, graphviz
  +, gtk2-x11
   , interpreter
  -, glib
  -, pango
  -, cairo
  -, gtk2-x11
  -, gdk-pixbuf
  -, gnome2
  -, pcre
   , libGL
   , libGLU
  -, freealut
  +, libogg
  +, librsvg
  +, libvorbis
  +, makeWrapper
  +, ncurses
  +, openal
   , openssl
  +, pango
  +, pcre
  +, runCommand
  +, runtimeShell
  +, tzdata
   , udis86
  -, openal
  -, libogg
  -, libvorbis
  -, graphviz
  -, librsvg
  +, unzip
  +, writeScriptBin
   , zlib
  -, tzdata
  -, ncurses
   }:
   let
     runtimeLibs = [
  +    cairo
  +    freealut
  +    gdk-pixbuf
       glib
  -    pango
  -    cairo
  +    gnome2.gtkglext
  +    graphviz
       gtk2-x11
  -    gdk-pixbuf
  -    gnome2.gtkglext
  -    pcre
       libGL
       libGLU
  -    freealut
  -    openssl
  -    udis86
  -    openal
       libogg
       libvorbis
  -    graphviz
  +    openal
  +    openssl
  +    pango
  +    pcre
  +    udis86
       zlib
     ];
   
  
positive.code:     runHook postBuild
    '';
  
    # For now, the check phase runs, but should always return 0.  This way the
    # logs contain the test failures until all unit tests are fixed.  Then, it
    # should return 1 if any test failures have occured.
    doCheck = false;
    checkPhase = ''
      runHook preCheck
  
negative.code: 
    meta = with lib; {
      homepage = "https://factorcode.org/";
      description = "A concatenative, stack-based programming language";
      longDescription = ''
        The Factor programming language is a concatenative, stack-based
        programming language with high-level features including dynamic types,
        extensible syntax, macros, and garbage collection. On a practical side,
        Factor has a full-featured library, supports many different platforms, and
        has been extensively documented.
  
        The implementation is fully compiled for performance, while still
        supporting interactive development. Factor applications are portable
        between all common platforms. Factor can deploy stand-alone applications
        on all platforms. Full source code for the Factor project is available
        under a BSD license.
      '';
      license = licenses.bsd2;
      maintainers = with maintainers; [ vrthra spacefrogg ];
      platforms = lib.intersectLists platforms.x86_64 platforms.linux;
    };
  