diff --git a/pkgs/by-name/br/breakpointHook/package.nix b/pkgs/by-name/br/breakpointHook/package.nix
index 88725ffd4282..bbdcf9e05651 100644
--- a/pkgs/by-name/br/breakpointHook/package.nix
+++ b/pkgs/by-name/br/breakpointHook/package.nix
@@ -9,7 +9,7 @@
 
 let
   attach = buildPackages.writeShellScriptBin "attach" ''
-    export PATH="${
+    export PATH="''${PATH:+''${PATH}:}${
       lib.makeBinPath [
         buildPackages.bash
         buildPackages.coreutils