diff --git a/lang/ninja/src/build.sld b/lang/ninja/src/build.sld
index 06e4ff0..c2fdb26 100644
--- a/lang/ninja/src/build.sld
+++ b/lang/ninja/src/build.sld
@@ -148,7 +148,7 @@
     (for-each append-file (build-edge-inputs current-edge))
     (for-each append-file (build-edge-implicit-dependencies current-edge))
     (for-each append-file (build-edge-order-only-dependencies current-edge))
-    
+
     (when
      (and
       (or (string=? (build-edge-rule current-edge) "CUSTOM_COMMAND")
@@ -310,7 +310,7 @@
        (if (eq? loc 'directory)
          (set! base-paths (mapping-set! base-paths path (delay (vfs-to-store (vfs-subdir (ninja-build-config-root-dir conf) vfs-path)))))
          (set! base-paths (mapping-set! base-paths path loc)))
-       (set! edges (mapping-set! edges path (cons 'base #f)))
+       (set! edges (mapping-set! edges path (cons (if (string-prefix? "meson-private/" path) 'base-path 'base) #f)))
        (set! path-to-vfs (mapping-set! path-to-vfs path kv)))
      (vfs-contents (ninja-build-config-root-dir conf)))
     (define filtered-vfs (mapping-copy (vfs-contents (ninja-build-config-root-dir conf))))