diff --git a/system/fontdir.nix b/system/fontdir.nix
index c33c627ba637..adb6cd64df01 100644
--- a/system/fontdir.nix
+++ b/system/fontdir.nix
@@ -2,7 +2,7 @@ args : with args; with builderDefs {src="";} null;
 	let localDefs = builderDefs rec {
 		src = "";/* put a fetchurl here */
 
-		buildInputs = [mkfontdir mkfontscale];
+		buildInputs = [mkfontdir mkfontscale ttmkfdir];
 		configureFlags = [];
 		fontDirs = import ./fonts.nix {inherit pkgs config;};
 		installPhase = FullDepEntry ("
@@ -30,6 +30,13 @@ args : with args; with builderDefs {src="";} null;
 		rm fonts.alias
 		mkfontdir
 		mkfontscale
+		mv fonts.scale fonts.scale.old
+		mv fonts.dir fonts.dir.old
+		ttmkfdir
+		cat fonts.scale.old >> fonts.scale
+		cat fonts.dir.old >> fonts.dir
+		rm fonts.dir.old
+		rm fonts.scale.old
 		cat \$( find ${fontalias}/ -name fonts.alias) >fonts.alias
 	") ["minInit" "addInputs"];
 	} null; /* null is a terminator for sumArgs */
diff --git a/system/system.nix b/system/system.nix
index ee8663b5ccc7..2a37622b6c0e 100644
--- a/system/system.nix
+++ b/system/system.nix
@@ -184,7 +184,7 @@ rec {
   # Font aggregation
   fontDir = import ./fontdir.nix {
     inherit config pkgs ;
-    inherit (pkgs) builderDefs ;
+    inherit (pkgs) builderDefs ttmkfdir;
     inherit (pkgs.xorg) mkfontdir mkfontscale fontalias;
   };