diff --git a/srcpkgs/python3-grpcio/template b/srcpkgs/python3-grpcio/template
index aeed305988a..aab1ae69886 100644
--- a/srcpkgs/python3-grpcio/template
+++ b/srcpkgs/python3-grpcio/template
@@ -4,7 +4,7 @@ version=1.39.0
 revision=2
 wrksrc="${pkgname#*-}-${version}"
 build_style=python3-module
-hostmakedepends="python3-setuptools python3-six"
+hostmakedepends="python3-setuptools python3-six python3-Cython"
 makedepends="python3-devel zlib-devel c-ares-devel re2-devel openssl-devel"
 depends="python3-six"
 short_desc="HTTP/2-based gRPC framework for Python"
@@ -34,4 +34,5 @@ post_patch() {
 		vsed -e "s@['\"]cc['\"]@'${CC}'@g" \
 			-i src/python/grpcio/commands.py
 	fi
+	rm -f src/python/grpcio/grpc/_cython/cygrpc.cpp
 }