diff --git a/pkgs/applications/science/electronics/tkgate/1.x.nix b/pkgs/applications/science/electronics/tkgate/1.x.nix
new file mode 100644
index 000000000000..97806f7662a2
--- /dev/null
+++ b/pkgs/applications/science/electronics/tkgate/1.x.nix
@@ -0,0 +1,36 @@
+{ stdenv, fetchurl, tcl, tk, libX11, libiconvOrLibc, which, yacc, flex, imake, xproto, gccmakedep }:
+
+stdenv.mkDerivation rec {
+  name = "tkgate-1.8.7";
+
+  src = fetchurl {
+    url = "http://www.tkgate.org/downloads/${name}.tgz";
+    sha256 = "1pqywkidfpdbj18i03h97f4cimld4fb3mqfy8jjsxs12kihm18fs";
+  };
+
+  buildInputs = [ tcl tk libX11 libiconvOrLibc which yacc flex imake xproto gccmakedep ];
+
+  patchPhase = ''
+    sed -i config.h \
+      -e 's|.*#define.*TKGATE_TCLTK_VERSIONS.*|#define TKGATE_TCLTK_VERSIONS "8.5"|' \
+      -e 's|.*#define.*TKGATE_INCDIRS.*|#define TKGATE_INCDIRS "${tcl}/include ${tk}/include ${libiconvOrLibc}/include ${libX11}/include"|' \
+      -e 's|.*#define.*TKGATE_LIBDIRS.*|#define TKGATE_LIBDIRS "${tcl}/lib ${tk}/lib ${libiconvOrLibc}/lib ${libX11}/lib"|' \
+      \
+      -e '20 i #define TCL_LIBRARY "${tcl}/lib"' \
+      -e '20 i #define TK_LIBRARY "${tk}/lib/${tk.libPrefix}"' \
+      -e '20 i #define USE_ICONV 1' \
+      \
+      -e "s|.*#define.*TKGATE_HOMEDIRBASE.*|#define TKGATE_HOMEDIRBASE \\\"$out/lib\\\"|" \
+      -e "s|.*#define.*TKGATE_BINDIR.*|#define TKGATE_BINDIR \\\"$out/bin\\\"|" \
+      -e "s|.*#define.*TKGATE_MANDIR.*|#define TKGATE_MANDIR \\\"$out/share/man/man1\\\"|" \
+      -e "s|file:/usr/X11R6/lib/tkgate-|file://$out/lib/tkgate-|"
+  '';
+
+  meta = {
+    description = "Event driven digital circuit simulator with a TCL/TK-based graphical editor";
+    homepage = "http://www.tkgate.org/";
+    license = "GPLv2+";
+    maintainers = [ stdenv.lib.maintainers.simons ];
+    platforms = stdenv.lib.platforms.linux;
+  };
+}
diff --git a/pkgs/applications/science/electronics/tkgate/2.x.nix b/pkgs/applications/science/electronics/tkgate/2.x.nix
new file mode 100644
index 000000000000..608a2f890ab4
--- /dev/null
+++ b/pkgs/applications/science/electronics/tkgate/2.x.nix
@@ -0,0 +1,31 @@
+{ stdenv, fetchurl, tcl, tk, libX11, libiconvOrLibc }:
+
+stdenv.mkDerivation rec {
+  name = "tkgate-2.0-b10";
+
+  src = fetchurl {
+    url = "http://www.tkgate.org/downloads/${name}.tgz";
+    sha256 = "0mr061xcwjmd8nhyjjcw2dzxqi53hv9xym9xsp0cw98knz2skxjf";
+  };
+
+  buildInputs = [ tcl tk libX11 ];
+
+  dontStrip = true;
+
+  patchPhase = ''
+    sed -i configure \
+      -e 's|TKGATE_INCDIRS=.*|TKGATE_INCDIRS="${tcl}/include ${tk}/include ${libiconvOrLibc}/include"|' \
+      -e 's|TKGATE_LIBDIRS=.*|TKGATE_LIBDIRS="${tcl}/lib ${tk}/lib ${libiconvOrLibc}/lib"|'
+    sed -i options.h \
+      -e 's|.* #define TCL_LIBRARY .*|#define TCL_LIBRARY "${tcl}/${tcl.libdir}"|' \
+      -e 's|.* #define TK_LIBRARY .*|#define TK_LIBRARY "${tk}/lib/${tk.libPrefix}"|'
+  '';
+
+  meta = {
+    description = "Event driven digital circuit simulator with a TCL/TK-based graphical editor";
+    homepage = "http://www.tkgate.org/";
+    license = "GPLv2+";
+    maintainers = [ stdenv.lib.maintainers.simons ];
+    platforms = stdenv.lib.platforms.linux;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index d84285f4778e..597c9923f1ba 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1643,6 +1643,15 @@ let
 
   tkabber_plugins = callPackage ../applications/networking/instant-messengers/tkabber-plugins { };
 
+  tkgate = callPackage ../applications/science/electronics/tkgate/1.x.nix {
+    inherit (xlibs) libX11 imake xproto gccmakedep;
+  };
+
+  # The newer package is low-priority because it segfaults at startup.
+  tkgate2 = lowPrio (callPackage ../applications/science/electronics/tkgate/2.x.nix {
+    inherit (xlibs) libX11;
+  });
+
   tm = callPackage ../tools/system/tm { };
 
   trang = callPackage ../tools/text/xml/trang { };