diff --git a/overlays/preferences.nix b/overlays/preferences.nix
index 7d8117484..32cf3a134 100644
--- a/overlays/preferences.nix
+++ b/overlays/preferences.nix
@@ -23,7 +23,7 @@ in
   # DISABLE HDCP BLOB in pinephone pro.
   # this is used by u-boot; requires redeploying the bootloader (the SPL, specifically).
   # i can see that nixpkgs does process this option, but the hash of bl31.elf doesn't actually change
-  arm-trusted-firmware = super.arm-trusted-firmware.override {
+  buildArmTrustedFirmware = super.buildArmTrustedFirmware.override {
     unfreeIncludeHDCPBlob = false;
   };