diff --git a/build/build.js b/build/build.js
index 5e959ed..4de7cb7 100644
--- a/build/build.js
+++ b/build/build.js
@@ -32,6 +32,7 @@ async function buildDawnNode() {
       ...addElemIf(!isWin, '-GNinja'),
       '-DDAWN_BUILD_NODE_BINDINGS=1',
       '-DDAWN_USE_X11=OFF',
+      '-DCMAKE_BUILD_TYPE=Release',
       ...addElemIf(isWin, '-DCMAKE_SYSTEM_VERSION=10.0.26100.0'),
       ...addElemIf(isMac, '-DCMAKE_OSX_SYSROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk'),
     ]);
@@ -46,7 +47,7 @@ async function buildDawnNode() {
 }
 
 async function copyResult(filepath, target) {
-  const srcFilename = path.join(...[filepath, ...addElemIf(isWin, 'Debug'), 'dawn.node']);
+  const srcFilename = path.join(...[filepath, ...addElemIf(isWin, 'Release'), 'dawn.node']);
   const dstFilename = path.join('dist', `${target}.dawn.node`);
   fs.mkdirSync(path.dirname(dstFilename), {recursive: true});
   fs.copyFileSync(srcFilename, dstFilename);