PHP: windows config.w32 file
diff --git a/build.yaml b/build.yaml
index 30c7a8e..98401b8 100644
--- a/build.yaml
+++ b/build.yaml
@@ -4630,6 +4630,7 @@
   - grpc
   - gpr
   - boringssl
+  - z
   headers:
   - src/php/ext/grpc/byte_buffer.h
   - src/php/ext/grpc/call.h