diff --git a/pkgs/data/icons/numix-icon-theme-circle/default.nix b/pkgs/data/icons/numix-icon-theme-circle/default.nix
index c85f01d2718..96ad0e2c2b8 100644
--- a/pkgs/data/icons/numix-icon-theme-circle/default.nix
+++ b/pkgs/data/icons/numix-icon-theme-circle/default.nix
@@ -11,11 +11,11 @@ stdenv.mkDerivation rec {
     sha256 = "0za44h7f4vk37yl30xlaa6w76maiipb6p63gl9hl1rshdn9nxq0y";
   };
 
-  nativeBuildInputs = [ gtk3 numix-icon-theme ];
+  nativeBuildInputs = [ gtk3 ];
 
-  propagatedBuildInputs = [
-    hicolor-icon-theme
-  ];
+  buildInputs = [ numix-icon-theme ];
+
+  propagatedBuildInputs = [ hicolor-icon-theme ];
 
   dontDropIconThemeCache = true;
 
diff --git a/pkgs/data/icons/numix-icon-theme-square/default.nix b/pkgs/data/icons/numix-icon-theme-square/default.nix
index 620ef02fde7..644d20cccfd 100644
--- a/pkgs/data/icons/numix-icon-theme-square/default.nix
+++ b/pkgs/data/icons/numix-icon-theme-square/default.nix
@@ -2,20 +2,20 @@
 
 stdenv.mkDerivation rec {
   pname = "numix-icon-theme-square";
-  version = "19.09.20";
+  version = "19.12.27";
 
   src = fetchFromGitHub {
     owner = "numixproject";
     repo = pname;
     rev = version;
-    sha256 = "0q3d4d4wndknz3043bh8ardjvdpds2hkzk73kyyh1848wg4ff0ly";
+    sha256 = "0pjbi2g7wk8gyr4lvp8fvcb8z29kc3l6v19a45axgadnc609hqw7";
   };
 
-  nativeBuildInputs = [ gtk3 numix-icon-theme ];
+  nativeBuildInputs = [ gtk3 ];
 
-  propagatedBuildInputs = [
-    hicolor-icon-theme
-  ];
+  buildInputs = [ numix-icon-theme ];
+
+  propagatedBuildInputs = [ hicolor-icon-theme ];
 
   dontDropIconThemeCache = true;