diff --git a/dune b/dune
index 6e81125..bb7c665 100644
--- a/dune
+++ b/dune
@@ -46,7 +46,7 @@
      -DBUILD_STATIC_LIB=ON
      -DCMAKE_BUILD_TYPE=Release
      -DCMAKE_INSTALL_PREFIX=binaryen)
-    (run ninja --build binaryen --config Release -- -j4)
+    (run ninja -C binaryen binaryen)
     (copy binaryen/lib/libbinaryen.a libbinaryen.a)))))
 
 (rule
@@ -74,7 +74,7 @@
      -DBUILD_STATIC_LIB=OFF
      -DCMAKE_BUILD_TYPE=Release
      -DCMAKE_INSTALL_PREFIX=binaryen)
-    (run ninja --build binaryen --config Release -- -j4)
+    (run ninja -C binaryen binaryen)
     (copy binaryen/lib/libbinaryen.dylib dllbinaryen.so)))))
 
 (rule
@@ -104,7 +104,7 @@
      -DBUILD_STATIC_LIB=OFF
      -DCMAKE_BUILD_TYPE=Release
      -DCMAKE_INSTALL_PREFIX=binaryen)
-    (run ninja --build binaryen --config Release -- -j4)
+    (run ninja -C binaryen binaryen)
     (copy binaryen/lib/libbinaryen.so dllbinaryen.so)))))
 
 (rule
@@ -133,5 +133,5 @@
      -DBUILD_STATIC_LIB=OFF
      -DCMAKE_BUILD_TYPE=Release
      -DCMAKE_INSTALL_PREFIX=binaryen)
-    (run ninja --build binaryen --config Release -- -j4)
+    (run ninja -C binaryen binaryen)
     (copy binaryen/bin/libbinaryen.dll dllbinaryen.dll)))))