Adding Steam Locomotive, for the fun

pkgs/tools/misc/sl/default.nix

@@ -0,0 +1,28 @@
+{ stdenv, fetchurl, ncurses }:
+
+stdenv.mkDerivation {
+  name = "sl-3.03";
+
+  src = fetchurl {
+    url = "http://www.tkl.iis.u-tokyo.ac.jp/~toyoda/sl/sl.tar";
+    sha256 = "1x3517aza0wm9hhb02npl8s7xy947cdidxmans27q0gjmj3bvg5j";
+  };
+
+  patchPhase = ''
+    sed -i "s/-lcurses -ltermcap/-lncurses/" Makefile
+  '';
+
+  buildInputs = [ ncurses ];
+
+  installPhase = ''
+    ensureDir $out/bin
+    cp sl $out/bin
+  '';
+
+  meta = {
+    homepage = http://www.tkl.iis.u-tokyo.ac.jp/~toyoda/index_e.html;
+    license = "unfree"; # I couldn't find its license, only a copyright.
+    description = "Steam Locomotive runs across your terminal when you type 'sl'";
+    platforms = with stdenv.lib.platforms; linux;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -1577,6 +1577,8 @@ let
 
   fusesmb = callPackage ../tools/filesystems/fusesmb { };
 
+  sl = callPackage ../tools/misc/sl { };
+
   socat = callPackage ../tools/networking/socat { };
 
   sourceHighlight = callPackage ../tools/text/source-highlight { };