diff --git a/programs/rust.nix b/programs/rust.nix
index 19525ee..3152b8c 100644
--- a/programs/rust.nix
+++ b/programs/rust.nix
@@ -1,8 +1,8 @@
 {pkgs, ...}: let
   inherit (pkgs) lib;
+  toml = pkgs.formats.toml {};
 in {
-  home.file.".cargo/config.toml".text = ''
-    [build]
-    rustc-wrapper = "${lib.getExe' pkgs.sccache "sccache"}"
-  '';
+  home.file.".cargo/config.toml".source = toml.generate "config.toml" {
+    build.rustc-wrapper = lib.getExe' pkgs.sccache "sccache";
+  };
 }