diff --git a/docs/docgen.nix b/docs/docgen.nix
index c81ed02..b63b181 100644
--- a/docs/docgen.nix
+++ b/docs/docgen.nix
@@ -69,7 +69,7 @@ stdenvNoCC.mkDerivation {
               if dirPart == "." then 0 else lib.length (lib.splitString "/" dirPart);
             indent = lib.concatStringsSep "" (lib.genList (x: "    ") depth);
 
-            isModule = (r: lib.hasPrefix "modules/os" r || lib.hasPrefix "modules/home" r) relPath;
+            isModule = (r: lib.hasPrefix "modules/os" r || lib.hasPrefix "modules/home" r) (relPath file);
             modulesEval = lib.evalModules {
               modules = [
                 file