IT WORKS

tests/harmonia/test.nix

@@ -1,4 +1,7 @@
 { mkDynixConfigurationDotNix, config, ... }:
+let
+  testName = config.name;
+in
 {
   name = "nixos-test-dynamicism-harmonia";
 
@@ -6,21 +9,13 @@
 
   extraPythonPackages = p: [ p.beartype ];
 
-  nodes.machine = { name, pkgs, ... }: {
+  nodes.machine = { ... }: {
     imports = [ ./configuration.nix ];
 
-    environment.systemPackages = let
-      #configFileTree = pkgs.runCommand "${name}-configuration-dot-nix" { } ''
-      #  set -euo pipefail
-      #  install -Dm a=r ${./configuration.nix} "$out/share/nixos/configuration.nix"
-      #'';
-      configFileTree = mkDynixConfigurationDotNix {
-        inherit (config) name;
-        configuration = ./configuration.nix;
-      };
-    in [
-      configFileTree
-    ];
+    passthru.configurationDotNix = mkDynixConfigurationDotNix {
+      name = testName;
+      configuration = ./configuration.nix;
+    };
   };
 
   testScript = builtins.readFile ./test-script.py;