diff --git a/pkgs/build-support/testers/default.nix b/pkgs/build-support/testers/default.nix
index fbe37c3b8678..0393895d53af 100644
--- a/pkgs/build-support/testers/default.nix
+++ b/pkgs/build-support/testers/default.nix
@@ -31,7 +31,7 @@
         };
       })
       orig.realBuilder or stdenv.shell
-    ] ++ orig.args or ["-e" (orig.builder or ../../stdenv/generic/default-builder.sh)];
+    ] ++ orig.args or ["-e" ../../stdenv/generic/source-stdenv.sh (orig.builder or ../../stdenv/generic/default-builder.sh)];
   });
 
   # See https://nixos.org/manual/nixpkgs/unstable/#tester-testEqualDerivation
diff --git a/pkgs/build-support/testers/expect-failure.sh b/pkgs/build-support/testers/expect-failure.sh
index e8eb612b0d8b..08199191be7d 100644
--- a/pkgs/build-support/testers/expect-failure.sh
+++ b/pkgs/build-support/testers/expect-failure.sh
@@ -35,7 +35,7 @@ echo "testBuildFailure: Original builder produced exit code: $r"
 # -----------------------------------------
 # Write the build log to the default output
 
-# Source structured attrs as per nixpkgs/pkgs/stdenv/generic/default-builder.sh
+# Source structured attrs as per nixpkgs/pkgs/stdenv/generic/source-stdenv.sh
 #
 # We need this so that we can read $outputs when `__structuredAttrs` is enabled
 #