diff --git a/scripts/nightly.yaml b/scripts/nightly.yaml
index 69fedc00c..2bf85c562 100644
--- a/scripts/nightly.yaml
+++ b/scripts/nightly.yaml
@@ -1,6 +1,6 @@
 variables:
   ReleaseVersion: '4.8.15'
-  MacFlags: 'CXXFLAGS=-arch arm64 LINK_EXTRA_FLAGS=-arch arm64 SLINK_EXTRA_FLAGS=-arch arm64'
+  MacFlags: 'CXXFLAGS="-arch arm64" LINK_EXTRA_FLAGS="-arch arm64" SLINK_EXTRA_FLAGS="-arch arm64"'
 
 stages:
 - stage: Build