diff --git a/dev-python/grpcio-tools/grpcio-tools-1.17.1.ebuild b/dev-python/grpcio-tools/grpcio-tools-1.17.1.ebuild
index 5ea474da86e33..55d28e451d57c 100644
--- a/dev-python/grpcio-tools/grpcio-tools-1.17.1.ebuild
+++ b/dev-python/grpcio-tools/grpcio-tools-1.17.1.ebuild
@@ -4,7 +4,7 @@
 EAPI=7
 
 PYTHON_COMPAT=( python2_7 python3_{5,6} )
-inherit distutils-r1
+inherit distutils-r1 multiprocessing
 
 DESCRIPTION="Protobuf code generator for gRPC"
 HOMEPAGE="https://grpc.io"
@@ -24,6 +24,7 @@ DEPEND="${RDEPEND}
 "
 
 python_compile() {
+	export GRPC_PYTHON_BUILD_EXT_COMPILER_JOBS="$(makeopts_jobs)"
 	export GRPC_PYTHON_BUILD_WITH_CYTHON=1
 	distutils-r1_python_compile
 }
diff --git a/dev-python/grpcio-tools/grpcio-tools-1.18.0.ebuild b/dev-python/grpcio-tools/grpcio-tools-1.18.0.ebuild
index 5ea474da86e33..55d28e451d57c 100644
--- a/dev-python/grpcio-tools/grpcio-tools-1.18.0.ebuild
+++ b/dev-python/grpcio-tools/grpcio-tools-1.18.0.ebuild
@@ -4,7 +4,7 @@
 EAPI=7
 
 PYTHON_COMPAT=( python2_7 python3_{5,6} )
-inherit distutils-r1
+inherit distutils-r1 multiprocessing
 
 DESCRIPTION="Protobuf code generator for gRPC"
 HOMEPAGE="https://grpc.io"
@@ -24,6 +24,7 @@ DEPEND="${RDEPEND}
 "
 
 python_compile() {
+	export GRPC_PYTHON_BUILD_EXT_COMPILER_JOBS="$(makeopts_jobs)"
 	export GRPC_PYTHON_BUILD_WITH_CYTHON=1
 	distutils-r1_python_compile
 }
diff --git a/dev-python/grpcio-tools/grpcio-tools-1.19.0.ebuild b/dev-python/grpcio-tools/grpcio-tools-1.19.0.ebuild
index 04f4b78e49f18..54eb74fc63257 100644
--- a/dev-python/grpcio-tools/grpcio-tools-1.19.0.ebuild
+++ b/dev-python/grpcio-tools/grpcio-tools-1.19.0.ebuild
@@ -4,7 +4,7 @@
 EAPI=7
 
 PYTHON_COMPAT=( python2_7 python3_{5,6,7} )
-inherit distutils-r1
+inherit distutils-r1 multiprocessing
 
 DESCRIPTION="Protobuf code generator for gRPC"
 HOMEPAGE="https://grpc.io"
@@ -24,6 +24,7 @@ DEPEND="${RDEPEND}
 "
 
 python_compile() {
+	export GRPC_PYTHON_BUILD_EXT_COMPILER_JOBS="$(makeopts_jobs)"
 	export GRPC_PYTHON_BUILD_WITH_CYTHON=1
 	distutils-r1_python_compile
 }