diff --git a/pkgs/data/icons/numix-icon-theme-circle/default.nix b/pkgs/data/icons/numix-icon-theme-circle/default.nix
index 3de3dbe110c..5982074991f 100644
--- a/pkgs/data/icons/numix-icon-theme-circle/default.nix
+++ b/pkgs/data/icons/numix-icon-theme-circle/default.nix
@@ -1,7 +1,7 @@
-{ stdenv, fetchFromGitHub, numix-icon-theme }:
+{ stdenv, fetchFromGitHub, gtk3, numix-icon-theme }:
 
 stdenv.mkDerivation rec {
-  version = "17-12-25";
+  version = "18-02-16";
 
   package-name = "numix-icon-theme-circle";
 
@@ -11,18 +11,22 @@ stdenv.mkDerivation rec {
     owner = "numixproject";
     repo = package-name;
     rev = version;
-    sha256 = "10sn2w9xzmh7arbw0vn516p9nfym1bs8bf7i8zzvz7y09s61lkxh";
+    sha256 = "0q08q1czsk6h0dxqscbgryr12xaakp4zbch37z0jxpwh087gnq4f";
   };
 
-  buildInputs = [ numix-icon-theme ];
-
-  dontBuild = true;
+  nativeBuildInputs = [ gtk3 numix-icon-theme ];
 
   installPhase = ''
     install -dm 755 $out/share/icons
     cp -dr --no-preserve='ownership' Numix-Circle{,-Light} $out/share/icons/
   '';
 
+  postFixup = ''
+    for theme in $out/share/icons/*; do
+      gtk-update-icon-cache $theme
+    done
+  '';
+
   meta = with stdenv.lib; {
     description = "Numix icon theme (circle version)";
     homepage = https://numixproject.org;
diff --git a/pkgs/data/icons/numix-icon-theme-square/default.nix b/pkgs/data/icons/numix-icon-theme-square/default.nix
index 503a66b736f..198229cce37 100644
--- a/pkgs/data/icons/numix-icon-theme-square/default.nix
+++ b/pkgs/data/icons/numix-icon-theme-square/default.nix
@@ -1,26 +1,30 @@
-{ stdenv, fetchFromGitHub, numix-icon-theme }:
+{ stdenv, fetchFromGitHub, gtk3, numix-icon-theme }:
 
 stdenv.mkDerivation rec {
   name = "${package-name}-${version}";
   package-name = "numix-icon-theme-square";
-  version = "17-12-25";
+  version = "18-02-16";
 
   src = fetchFromGitHub {
     owner = "numixproject";
     repo = package-name;
     rev = version;
-    sha256 = "07rcfkz3c1z5fwqiib4r1bm964mpwf1f128xm8kz55xp6w1c7zgl";
+    sha256 = "1gjwc0s6a7q1jby5bcwxkcmbs470m81y8s0clsm0qhcmcn1c36xj";
   };
 
-  buildInputs = [ numix-icon-theme ];
-
-  dontBuild = true;
+  nativeBuildInputs = [ gtk3 numix-icon-theme ];
 
   installPhase = ''
     mkdir -p $out/share/icons
     cp -a Numix-Square{,-Light} $out/share/icons/
   '';
 
+  postFixup = ''
+    for theme in $out/share/icons/*; do
+      gtk-update-icon-cache $theme
+    done
+  '';
+
   meta = with stdenv.lib; {
     description = "Numix icon theme (square version)";
     homepage = https://numixproject.org;