diff --git a/pkgs/tools/misc/cc2538-bsl/default.nix b/pkgs/tools/misc/cc2538-bsl/default.nix
index 77280835fe06..2fb7fc2030a8 100644
--- a/pkgs/tools/misc/cc2538-bsl/default.nix
+++ b/pkgs/tools/misc/cc2538-bsl/default.nix
@@ -4,7 +4,7 @@ python3Packages.buildPythonPackage rec {
   pname = "cc2538-bsl";
   version = "unstable-2022-08-03";
 
-  src = fetchFromGitHub rec {
+  src = fetchFromGitHub {
     owner = "JelmerT";
     repo = pname;
     rev = "538ea0deb99530e28fdf1b454e9c9d79d85a3970";