Add support for environment.systemPackages.

examples/example.nix

@@ -1,10 +1,16 @@
-{ lib, ... }: {
+{ lib, pkgs, ... }: {
   config = {
     nixpkgs.hostPlatform = "x86_64-linux";
 
     services.nginx.enable = true;
 
-    environment.etc = {
+    environment = {
+      systemPackages = [
+        pkgs.ripgrep
+        pkgs.fd
+      ];
+
+      etc = {
         foo = {
           text = ''
             This is just a test!
@@ -48,6 +54,8 @@
           source = "/run/systemd/system/";
         };
       };
+    };
+
     systemd.services =
       lib.listToAttrs
         (lib.flip lib.genList 10 (ix:

nix/lib.nix

@@ -284,6 +284,13 @@ in
       cp ${resultImg} $out
     '';
 
+  mkTestPreamble = node: action: ''
+    ${node}.succeed("/system-manager-profile/bin/${action} 2>&1 | tee /tmp/output.log")
+    ${node}.succeed("grep -vF 'ERROR' /tmp/output.log")
+  '';
+
+  activateProfileSnippet = node: self.lib.mkTestPreamble node "activate";
+
   make-vm-test =
     name:
     { system

nix/modules/default.nix

@@ -6,6 +6,7 @@
 }:
 {
   imports = [
+    ./environment.nix
     ./etc.nix
     ./systemd.nix
     ./upstream/nixpkgs
@@ -16,7 +17,6 @@
       inherit (lib) types;
     in
     {
-
       nixpkgs = {
         # TODO: switch to lib.systems.parsedPlatform
         hostPlatform = lib.mkOption {

nix/modules/environment.nix

@@ -0,0 +1,17 @@
+{ lib, config, pkgs, ... }:
+
+{
+  options.environment = {
+    systemPackages = lib.mkOption {
+      type = lib.types.listOf lib.types.package;
+      default = [ ];
+    };
+  };
+
+  config = {
+    environment.etc."profile.d/system-manager-path.sh".source =
+      pkgs.writeShellScript "system-manager-path.sh" ''
+        export PATH=${lib.makeBinPath config.environment.systemPackages}:''${PATH}
+      '';
+  };
+}

test/nix/modules/default.nix

@@ -222,3 +222,47 @@ forEachUbuntuImage
       ];
     })
   )
+
+  //
+
+forEachUbuntuImage
+  (imgName: image: lib.nameValuePair
+    "vm-test-system-path-${imgName}"
+    (system-manager.lib.make-vm-test "vm-test-system-path-${imgName}" {
+      inherit system;
+      modules = [
+        ({ config, ... }:
+          let
+            inherit (config) hostPkgs;
+          in
+          {
+            nodes = {
+              node1 = { config, ... }: {
+                modules = [
+                  ../../../examples/example.nix
+                ];
+
+                virtualisation.rootImage = system-manager.lib.prepareUbuntuImage {
+                  inherit hostPkgs image;
+                  nodeConfig = config;
+                };
+              };
+            };
+
+            testScript = ''
+              # Start all machines in parallel
+              start_all()
+
+              ${system-manager.lib.activateProfileSnippet "node1"}
+
+              node1.succeed("/system-manager-profile/bin/activate 2>&1 | tee /tmp/output.log")
+              node1.succeed("grep -vF 'ERROR' /tmp/output.log")
+              node1.wait_for_unit("system-manager.target")
+
+              node1.succeed("bash --login -c 'realpath $(which rg) | grep -F ${hostPkgs.ripgrep}/bin/rg'")
+              node1.succeed("bash --login -c 'realpath $(which fd) | grep -F ${hostPkgs.fd}/bin/fd'")
+            '';
+          })
+      ];
+    })
+  )