diff --git a/pkgs/development/libraries/fontconfig/make-fonts-cache.nix b/pkgs/development/libraries/fontconfig/make-fonts-cache.nix
index 1c88235b9257..dcef4a4b205f 100644
--- a/pkgs/development/libraries/fontconfig/make-fonts-cache.nix
+++ b/pkgs/development/libraries/fontconfig/make-fonts-cache.nix
@@ -1,8 +1,8 @@
-{ runCommand, lib, fontconfig, fontDirectories }:
+{ runCommand, lib, fontconfig, fontDirectories, buildPackages }:
 
 runCommand "fc-cache"
   rec {
-    buildInputs = [ fontconfig.bin ];
+    nativeBuildInputs = [ buildPackages.fontconfig.bin ];
     preferLocalBuild = true;
     passAsFile = [ "fontDirs" ];
     fontDirs = ''
diff --git a/pkgs/development/libraries/fontconfig/make-fonts-conf.nix b/pkgs/development/libraries/fontconfig/make-fonts-conf.nix
index 3cd4a894b37f..4d353f5d7e26 100644
--- a/pkgs/development/libraries/fontconfig/make-fonts-conf.nix
+++ b/pkgs/development/libraries/fontconfig/make-fonts-conf.nix
@@ -2,7 +2,7 @@
 
 runCommand "fonts.conf"
   {
-    buildInputs = [ libxslt fontconfig ];
+    nativeBuildInputs = [ libxslt fontconfig ];
     # Add a default font for non-nixos systems, <1MB and in nixos defaults.
     fontDirectories = fontDirectories ++ [ dejavu_fonts.minimal ];
   }