diff --git a/netlify.toml b/netlify.toml
index a4e82a27b3..ed3d48d4b0 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -1,2 +1,14 @@
-[build.environment]
-  YARN_FLAGS = "--update-checksums"
\ No newline at end of file
+[build]
+  ignore = '''
+    if [ "$CONTEXT" = "deploy-preview" ]; then
+      if [ "$BRANCH" = "master" ]; then
+        exit 1
+      fi
+
+      case "$BRANCH" in
+        wip-*) exit 1 ;;
+        *) exit 0 ;;
+      esac
+    fi
+    exit 1
+  '''
\ No newline at end of file