diff --git a/nixos/modules/config/gtk-exe-env.nix b/nixos/modules/config/gtk-exe-env.nix
deleted file mode 100644
index b565072e3a7..00000000000
--- a/nixos/modules/config/gtk-exe-env.nix
+++ /dev/null
@@ -1,41 +0,0 @@
-{ config, pkgs, lib, ... }:
-
-{
-  imports = [
-  ];
-
-  options = {
-    gtkPlugins = lib.mkOption {
-      type = lib.types.listOf lib.types.path;
-      default = [];
-      description = ''
-        Plugin packages for GTK+ such as input methods.
-      '';
-    };
-  };
-
-  config = {
-    environment.variables = if builtins.length config.gtkPlugins > 0
-      then
-        let
-          paths = [ pkgs.gtk2 pkgs.gtk3 ] ++ config.gtkPlugins;
-          env = pkgs.buildEnv {
-            name = "gtk-exe-env";
-
-            inherit paths;
-
-            postBuild = lib.concatStringsSep "\n"
-              (map (d: d.gtkExeEnvPostBuild or "") paths);
-
-            ignoreCollisions = true;
-          };
-        in {
-          GTK_EXE_PREFIX = builtins.toString env;
-          GTK_PATH = [
-            "${env}/lib/gtk-2.0"
-            "${env}/lib/gtk-3.0"
-          ];
-        }
-      else {};
-  };
-}
diff --git a/nixos/modules/config/qt-plugin-env.nix b/nixos/modules/config/qt-plugin-env.nix
deleted file mode 100644
index c5986560416..00000000000
--- a/nixos/modules/config/qt-plugin-env.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{ config, pkgs, lib, ... }:
-
-{
-  imports = [
-  ];
-
-  options = {
-    qtPlugins = lib.mkOption {
-      type = lib.types.listOf lib.types.path;
-      default = [];
-      description = ''
-        Plugin packages for Qt such as input methods.
-      '';
-    };
-  };
-
-  config = {
-    environment.variables = if builtins.length config.qtPlugins > 0
-      then
-        let
-          paths = [ pkgs.qt48 ] ++ config.qtPlugins;
-          env = pkgs.buildEnv {
-            name = "qt-plugin-env";
-
-            inherit paths;
-
-            postBuild = lib.concatStringsSep "\n"
-              (map (d: d.qtPluginEnvPostBuild or "") paths);
-
-            ignoreCollisions = true;
-          };
-        in {
-          QT_PLUGIN_PATH = [ (builtins.toString env) ];
-        }
-      else {};
-  };
-}
diff --git a/nixos/modules/i18n/inputMethod/fcitx.nix b/nixos/modules/i18n/inputMethod/fcitx.nix
index f168f445170..f73554b3edd 100644
--- a/nixos/modules/i18n/inputMethod/fcitx.nix
+++ b/nixos/modules/i18n/inputMethod/fcitx.nix
@@ -29,8 +29,6 @@ in
 
   config = mkIf (config.i18n.inputMethod.enabled == "fcitx") {
     environment.systemPackages = [ fcitxPackage ];
-    gtkPlugins = [ fcitxPackage ];
-    qtPlugins  = [ fcitxPackage ];
 
     environment.variables = {
       GTK_IM_MODULE = "fcitx";
diff --git a/nixos/modules/i18n/inputMethod/nabi.nix b/nixos/modules/i18n/inputMethod/nabi.nix
index 8c396595513..c6708365eff 100644
--- a/nixos/modules/i18n/inputMethod/nabi.nix
+++ b/nixos/modules/i18n/inputMethod/nabi.nix
@@ -4,7 +4,6 @@ with lib;
 {
   config = mkIf (config.i18n.inputMethod.enabled == "nabi") {
     environment.systemPackages = [ pkgs.nabi ];
-    qtPlugins  = [ pkgs.nabi ];
 
     environment.variables = {
       GTK_IM_MODULE = "nabi";
diff --git a/nixos/modules/i18n/inputMethod/uim.nix b/nixos/modules/i18n/inputMethod/uim.nix
index 401e1932f70..f8a3e560656 100644
--- a/nixos/modules/i18n/inputMethod/uim.nix
+++ b/nixos/modules/i18n/inputMethod/uim.nix
@@ -23,8 +23,6 @@ in
 
   config = mkIf (config.i18n.inputMethod.enabled == "uim") {
     environment.systemPackages = [ pkgs.uim ];
-    gtkPlugins = [ pkgs.uim ];
-    qtPlugins  = [ pkgs.uim ];
 
     environment.variables = {
       GTK_IM_MODULE = "uim";
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index a50b17068f6..738b52854de 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -7,7 +7,6 @@
   ./config/fonts/fonts.nix
   ./config/fonts/ghostscript.nix
   ./config/gnu.nix
-  ./config/gtk-exe-env.nix
   ./config/i18n.nix
   ./config/krb5.nix
   ./config/ldap.nix
@@ -16,7 +15,6 @@
   ./config/nsswitch.nix
   ./config/power-management.nix
   ./config/pulseaudio.nix
-  ./config/qt-plugin-env.nix
   ./config/shells-environment.nix
   ./config/swap.nix
   ./config/sysctl.nix