diff --git a/nixos/tests/scion/freestanding-deployment/default.nix b/nixos/tests/scion/freestanding-deployment/default.nix
index ca6c7cffc30e..7dbd10c225a5 100644
--- a/nixos/tests/scion/freestanding-deployment/default.nix
+++ b/nixos/tests/scion/freestanding-deployment/default.nix
@@ -23,7 +23,7 @@ import ../../make-test-python.nix (
           networkConfig.Address = "192.168.1.${toString hostId}/24";
         };
         environment.etc = {
-          "scion/topology.json".source = ./topology${toString hostId}.json;
+          "scion/topology.json".source = ./topology + "${toString hostId}.json";
           "scion/crypto/as".source = trust-root-configuration-keys + "/AS${toString hostId}";
           "scion/certs/ISD42-B1-S1.trc".source = trust-root-configuration-keys + "/ISD42-B1-S1.trc";
           "scion/keys/master0.key".text = "U${toString hostId}v4k23ZXjGDwDofg/Eevw==";
diff --git a/pkgs/test/make-binary-wrapper/default.nix b/pkgs/test/make-binary-wrapper/default.nix
index 6f086de299a0..715b28f912e4 100644
--- a/pkgs/test/make-binary-wrapper/default.nix
+++ b/pkgs/test/make-binary-wrapper/default.nix
@@ -20,7 +20,7 @@ let
     runCommand "make-binary-wrapper-test-${testname}" env ''
       mkdir -p tmp/foo # for the chdir test
 
-      source=${./${testname}}
+      source=${./. + "/${testname}"}
 
       params=$(<"$source/${testname}.cmdline")
       eval "makeCWrapper /send/me/flags $params" > wrapper.c