{ self, stdenvNoCC, doxygen, graphviz, texlive-env, gnumake }: let
  doxygen-step = stdenvNoCC.mkDerivation {
    pname = "invtracker-doxygen";
    version = self.lastModifiedDate;
    src = self;
    nativeBuildInputs = [doxygen graphviz];
    buildPhase = ''
    doxygen
    find doc/latex -name '*.tex' | xargs sed -i 's/\\newline/\\newline{}/g'
    '';
    installPhase = ''
      cp -rv doc $out
    '';
  };
  refman = stdenvNoCC.mkDerivation {
    name = "invtracker-refman-${self.lastModifiedDate}.pdf";
    pname = "invtracker-refman";
    version = self.lastModifiedDate;
    src = doxygen-step;
    nativeBuildInputs = [gnumake texlive-env];
    buildPhase = ''
      make -C latex LATEX_CMD=xelatex
    '';
    installPhase = ''
      cp -v latex/refman.pdf $out
    '';
  };
in refman