diff --git a/src/platform/kevin/default.nix b/src/platform/kevin/default.nix
index 35e4962..fc2f607 100644
--- a/src/platform/kevin/default.nix
+++ b/src/platform/kevin/default.nix
@@ -67,7 +67,7 @@ in {
 
     coreboot =
       let atf = final.nixpkgsOnBuildForHost.callPackage (import ./atf) {
-            buildArmTrustedFirmware = (final.nixpkgsOnBuildForHost.callPackage (import <nixpkgs/pkgs/misc/arm-trusted-firmware>) {
+            buildArmTrustedFirmware = (final.nixpkgsOnBuildForHost.arm-trusted-firmware.override {
               unfreeIncludeHDCPBlob = false;
               openssl = null;    # not sure why they would link in openssl...
             }).buildArmTrustedFirmware;