diff --git a/pkgs/applications/misc/xkbmon/default.nix b/pkgs/applications/misc/xkbmon/default.nix
new file mode 100644
index 000000000000..38bda9a8f560
--- /dev/null
+++ b/pkgs/applications/misc/xkbmon/default.nix
@@ -0,0 +1,25 @@
+{ stdenv, fetchFromGitHub, libX11 }:
+
+stdenv.mkDerivation rec {
+  name = "xkbmon-${version}";
+  version = "0.1";
+
+  src = fetchFromGitHub {
+    owner = "xkbmon";
+    repo = "xkbmon";
+    rev = version;
+    sha256 = "1smyqsd9cpbzqaplm221a8mq0nham6rg6hjsm9g5gph94xmk6d67";
+  };
+
+  buildInputs = [ libX11 ];
+
+  installPhase = "install -D -t $out/bin xkbmon";
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/xkbmon/xkbmon;
+    description = "Command-line keyboard layout monitor for X11";
+    license = licenses.gpl3;
+    platforms = platforms.linux;
+    maintainers = [ maintainers.romildo ];
+  };
+}
diff --git a/pkgs/applications/networking/feedreaders/rssguard/default.nix b/pkgs/applications/networking/feedreaders/rssguard/default.nix
index b25d4e109ebc..0a89ec6023be 100644
--- a/pkgs/applications/networking/feedreaders/rssguard/default.nix
+++ b/pkgs/applications/networking/feedreaders/rssguard/default.nix
@@ -1,22 +1,27 @@
-{ stdenv, fetchgit, qmake, qtwebengine, qttools, wrapGAppsHook }:
+{ stdenv, fetchFromGitHub, qmake, qtwebengine, qttools, wrapGAppsHook }:
 
 stdenv.mkDerivation rec {
-  name = "rssguard-${version}";
-  version = "3.4.2";
+  name = "${pname}-${version}";
+  pname = "rssguard";
+  version = "3.5.5";
 
-  src = fetchgit {
-    url = https://github.com/martinrotter/rssguard;
-    rev = "refs/tags/${version}";
-    sha256 = "0iy0fd3qr2dm0pc6xr7sin6cjfxfa0pxhxiwzs55dhsdk9zir62s";
-    # Submodules are required only for Windows (and one of them is a huge binary
-    # package ~400MB). See project wiki for more details.
-    fetchSubmodules = false;
+  src = fetchFromGitHub {
+    owner = "martinrotter";
+    repo = pname;
+    rev = version;
+    sha256 = "0swjh664y1yqr1rn3ym2kicyx7r97ypr4qf7qrjl4a5q1spzsv48";
   };
 
   buildInputs =  [ qtwebengine qttools ];
   nativeBuildInputs = [ qmake wrapGAppsHook ];
   qmakeFlags = [ "CONFIG+=release" ];
 
+  # FIXME: This shouldn't be needed after 3.5.5.
+  # See: https://github.com/martinrotter/rssguard/issues/175
+  preConfigure = ''
+    lrelease rssguard.pro
+  '';
+
   meta = with stdenv.lib; {
     description = "Simple RSS/Atom feed reader with online synchronization";
     longDescription = ''
diff --git a/pkgs/servers/irker/default.nix b/pkgs/servers/irker/default.nix
index 6ad233593a3b..002760ff0fd3 100644
--- a/pkgs/servers/irker/default.nix
+++ b/pkgs/servers/irker/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "1hslwqa0gqsnl3l6hd5hxpn0wlachxd51infifhlwhyhd6iwgx8p";
   };
 
-  nativeBuildInputs = [ pkgconfig xmlto docbook2x ];
+  nativeBuildInputs = [ pkgconfig xmlto docbook2x docbook_xsl docbook_xml_dtd_412 ];
 
   buildInputs = [
     python
@@ -21,10 +21,6 @@ stdenv.mkDerivation rec {
     # python.pkgs.pysocks
   ];
 
-  preBuild = ''
-    export XML_CATALOG_FILES='${docbook_xsl}/xml/xsl/docbook/catalog.xml ${docbook_xml_dtd_412}/xml/dtd/docbook/catalog.xml'
-  '';
-
   postPatch = ''
     substituteInPlace Makefile \
       --replace '-o 0 -g 0' ""
diff --git a/pkgs/tools/audio/pnmixer/default.nix b/pkgs/tools/audio/pnmixer/default.nix
index 385021b7354a..9906fa449dda 100644
--- a/pkgs/tools/audio/pnmixer/default.nix
+++ b/pkgs/tools/audio/pnmixer/default.nix
@@ -1,19 +1,19 @@
-{ stdenv, fetchFromGitHub, cmake, pkgconfig, gettext, alsaLib, gtk3, glib, libnotify, libX11 }:
+{ stdenv, fetchFromGitHub, cmake, pkgconfig, gettext, alsaLib, gtk3, glib, libnotify, libX11, pcre }:
 
 stdenv.mkDerivation rec {
   name = "pnmixer-${version}";
-  version = "0.7.1";
+  version = "0.7.2";
 
   src = fetchFromGitHub {
     owner = "nicklan";
     repo = "pnmixer";
     rev = "v${version}";
-    sha256 = "0mmrq4m2rk0wmkfmqs3fk2rnw5g5lvd7ill2s3d7ggf9vba1pcn2";
+    sha256 = "0416pa933ddf4b7ph9zxhk5jppkk7ppcq1aqph6xsrfnka4yb148";
   };
 
   nativeBuildInputs = [ cmake pkgconfig gettext ];
 
-  buildInputs = [ alsaLib gtk3 glib libnotify libX11 ];
+  buildInputs = [ alsaLib gtk3 glib libnotify libX11 pcre ];
 
   meta = with stdenv.lib; {
     homepage = https://github.com/nicklan/pnmixer;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c19d9a8afc15..bbaef3658d69 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -17730,6 +17730,8 @@ with pkgs;
 
   xkbset = callPackage ../tools/X11/xkbset { };
 
+  xkbmon = callPackage ../applications/misc/xkbmon { };
+
   win-spice = callPackage ../applications/virtualization/driver/win-spice { };
   win-virtio = callPackage ../applications/virtualization/driver/win-virtio { };
   win-qemu = callPackage ../applications/virtualization/driver/win-qemu { };