diff --git a/lib/licenses.nix b/lib/licenses.nix
index f54ab464357b..52956e52afa6 100644
--- a/lib/licenses.nix
+++ b/lib/licenses.nix
@@ -842,6 +842,12 @@ in mkLicense lset) ({
     fullName = "SGI Free Software License B v2.0";
   };
 
+  # Gentoo seems to treat it as a license:
+  # https://gitweb.gentoo.org/repo/gentoo.git/tree/licenses/SGMLUG?id=7d999af4a47bf55e53e54713d98d145f935935c1
+  sgmlug = {
+    fullName = "SGML UG SGML Parser Materials license";
+  };
+
   sleepycat = {
     spdxId = "Sleepycat";
     fullName = "Sleepycat License";
diff --git a/pkgs/tools/text/sgml/linuxdoc-tools/default.nix b/pkgs/tools/text/sgml/linuxdoc-tools/default.nix
new file mode 100644
index 000000000000..8050d084e350
--- /dev/null
+++ b/pkgs/tools/text/sgml/linuxdoc-tools/default.nix
@@ -0,0 +1,62 @@
+{ stdenv, lib, makeWrapper, fetchFromGitLab, openjade, gnumake, perl, flex
+, gnused, coreutils, which, opensp, groff, texlive, texinfo, withLatex ? false
+}:
+
+stdenv.mkDerivation rec {
+  pname = "linuxdoc-tools";
+  version = "0.9.82";
+
+  src = fetchFromGitLab {
+    owner = "agmartin";
+    repo = "linuxdoc-tools";
+    rev = version;
+    sha256 = "17v9ilh79av4n94vk4m52aq57ykb9myffxd2qr8kb8b3xnq5d36z";
+  };
+
+  outputs = [ "out" "man" "doc" ];
+
+  configureFlags = [
+    ("--enable-docs=txt info lyx html rtf"
+      + lib.optionalString withLatex " pdf")
+  ];
+
+  LEX = "flex";
+
+  postInstall = ''
+    wrapProgram $out/bin/linuxdoc \
+      --prefix PATH : "${lib.makeBinPath [ groff opensp ]}:$out/bin" \
+      --prefix PERL5LIB : "$out/share/linuxdoc-tools/"
+  '';
+
+  doInstallCheck = true;
+
+  installCheckPhase = ''
+    pushd doc/example
+    substituteInPlace Makefile \
+      --replace "COMMAND=linuxdoc" "COMMAND=$out/bin/linuxdoc" \
+      ${lib.optionalString (!withLatex) "--replace '.tex .dvi .ps .pdf' ''"}
+    make
+    popd
+  '';
+
+  nativeBuildInputs = [ flex which makeWrapper ];
+
+  buildInputs = [ opensp groff texinfo perl gnused coreutils ]
+    ++ lib.optionals withLatex [ texlive.combined.scheme-medium ];
+
+  meta = with lib; {
+    description = "Toolset for processing LinuxDoc DTD SGML files";
+    longDescription = ''
+      A collection of text formatters which understands a LinuxDoc DTD SGML
+      source file. Each formatter (or "back-end") renders the source file into
+      a variety of output formats, including HTML, TeX, DVI, PostScript, plain
+      text, and groff source in manual-page format. The linuxdoc suite is
+      provided for backward compatibility, because there are still many useful
+      documents written in LinuxDoc DTD sgml source.
+    '';
+    homepage = "https://gitlab.com/agmartin/linuxdoc-tools";
+    license = with licenses; [ gpl3Plus mit sgmlug ];
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ p-h ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b81d61fd6f6b..dff269af8f12 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4928,6 +4928,8 @@ with pkgs;
 
   linuxptp = callPackage ../os-specific/linux/linuxptp { };
 
+  linuxdoc-tools = callPackage ../tools/text/sgml/linuxdoc-tools { };
+
   lisgd = callPackage ../tools/inputmethods/lisgd { };
 
   lite = callPackage ../applications/editors/lite { };