diff --git a/pkgs/tools/package-management/lix/common-lix.nix b/pkgs/tools/package-management/lix/common-lix.nix
index 9c08270cc9db..18e5ed0cbe37 100644
--- a/pkgs/tools/package-management/lix/common-lix.nix
+++ b/pkgs/tools/package-management/lix/common-lix.nix
@@ -137,12 +137,17 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [
     # python3.withPackages does not splice properly, see https://github.com/NixOS/nixpkgs/issues/305858
-    (python3.pythonOnBuildForHost.withPackages (p: [
-      p.pytest
-      p.pytest-xdist
-      p.python-frontmatter
-      p.toml
-    ]))
+    (python3.pythonOnBuildForHost.withPackages (
+      p:
+      [
+        p.python-frontmatter
+        p.toml
+      ]
+      ++ lib.optionals finalAttrs.doInstallCheck [
+        p.pytest
+        p.pytest-xdist
+      ]
+    ))
     pkg-config
     flex
     jq