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Diffstat (limited to 'nixos/modules/config/fonts/fontconfig.nix')
-rw-r--r--nixos/modules/config/fonts/fontconfig.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixos/modules/config/fonts/fontconfig.nix b/nixos/modules/config/fonts/fontconfig.nix
index d79c43c0b5b9..724158f73821 100644
--- a/nixos/modules/config/fonts/fontconfig.nix
+++ b/nixos/modules/config/fonts/fontconfig.nix
@@ -46,7 +46,7 @@ let cfg = config.fonts.fontconfig;
     # use latest when no version is passed
     makeCacheConf = { version ? null }:
       let
-        fcPackage = if builtins.isNull version
+        fcPackage = if version == null
                     then "fontconfig"
                     else "fontconfig_${version}";
         makeCache = fontconfig: pkgs.makeFontsCache { inherit fontconfig; fontDirectories = config.fonts.fonts; };