1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/graphics/sane/backends/brscan4/default.nix b/pkgs/applications/graphics/sane/backends/brscan4/default.nix
index ec8efcc27c2a6..c15b3033a2651 100644
--- a/pkgs/applications/graphics/sane/backends/brscan4/default.nix
+++ b/pkgs/applications/graphics/sane/backends/brscan4/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
       url = "https://download.brother.com/welcome/dlf006645/${pname}-${version}.amd64.deb";
       sha256 = "sha256-Gpr5456MCNpyam3g2qPo7S3aEZFMaUGR8bu7YmRY8xk=";
     };
-  }."${stdenv.hostPlatform.system}";
+  }."${stdenv.hostPlatform.system}" or (throw "unsupported system ${stdenv.hostPlatform.system}");
 
   unpackPhase = ''
     ar x $src