diff --git a/pkgs/misc/arm-trusted-firmware/default.nix b/pkgs/misc/arm-trusted-firmware/default.nix
index 2636b917585b..0ad2f8c3acb7 100644
--- a/pkgs/misc/arm-trusted-firmware/default.nix
+++ b/pkgs/misc/arm-trusted-firmware/default.nix
@@ -63,9 +63,10 @@ let
           openssl # For fiptool
         ];
 
-        # Make the new toolchain guessing (from 2.11+) happy
-        # https://github.com/ARM-software/arm-trusted-firmware/blob/4ec2948fe3f65dba2f19e691e702f7de2949179c/make_helpers/toolchains/rk3399-m0.mk#L21-L22
-        rk3399-m0-oc = "${pkgsCross.arm-embedded.stdenv.cc.targetPrefix}objcopy";
+        # Make the new toolchain guessing (from 2.14+) happy
+        # https://github.com/ARM-software/arm-trusted-firmware/blob/1d5aa939bc8d3d892e2ed9945fa50e36a1a924cc/make_helpers/toolchain.mk#L370
+        # https://github.com/ARM-software/arm-trusted-firmware/blob/1d5aa939bc8d3d892e2ed9945fa50e36a1a924cc/make_helpers/toolchains/rk3399-m0.mk#L22
+        rk3399-m0-oc-parameter = "rk3399-m0-oc-default";
 
         buildInputs = [ openssl ];