diff --git a/pkgs/applications/misc/hamster-time-tracker/default.nix b/pkgs/applications/misc/hamster-time-tracker/default.nix
index 3a94456e6cc7..52298e6c297b 100644
--- a/pkgs/applications/misc/hamster-time-tracker/default.nix
+++ b/pkgs/applications/misc/hamster-time-tracker/default.nix
@@ -1,5 +1,6 @@
 { stdenv, fetchzip, buildPythonPackage, docbook2x, libxslt, gnome_doc_utils
 , intltool, dbus_glib, pygobject, pygtk, pyxdg, gnome_python, dbus, sqlite3
+, hicolor_icon_theme
 }:
 
 # TODO: Add optional dependency 'wnck', for "workspace tracking" support. Fixes
@@ -17,7 +18,9 @@ buildPythonPackage rec {
     sha256 = "1a85rcg561792kdyv744cgzw7mmpmgv6d6li1sijfdpqa1ninf8g";
   };
 
-  buildInputs = [ docbook2x libxslt gnome_doc_utils intltool dbus_glib ];
+  buildInputs = [
+    docbook2x libxslt gnome_doc_utils intltool dbus_glib hicolor_icon_theme
+  ];
 
   propagatedBuildInputs = [ pygobject pygtk pyxdg gnome_python dbus sqlite3 ];
 
diff --git a/pkgs/applications/misc/synapse/default.nix b/pkgs/applications/misc/synapse/default.nix
index 8086e8ca56d4..7dce7c7fbcd2 100644
--- a/pkgs/applications/misc/synapse/default.nix
+++ b/pkgs/applications/misc/synapse/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, intltool, pkgconfig, glib, libnotify, gtk3, libgee
-, keybinder3, json_glib, zeitgeist, vala
+, keybinder3, json_glib, zeitgeist, vala, hicolor_icon_theme
 }:
 
 with stdenv.lib;
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     intltool pkgconfig glib libnotify gtk3 libgee keybinder3 json_glib zeitgeist 
-    vala
+    vala hicolor_icon_theme
   ];
 
   meta = {