diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
new file mode 100644
index 0000000..ccbc925
--- /dev/null
+++ b/.github/workflows/linux.yml
@@ -0,0 +1,35 @@
+name: CI
+
+on: [push]
+
+jobs:
+  test:
+
+    runs-on: ubuntu-18.04
+
+    strategy:
+      fail-fast: false
+      max-parallel: 4
+      matrix:
+        compiler: [dmd, ldc, dmd-beta, ldc-beta]
+
+    steps:
+    - uses: actions/checkout@v1
+
+    - name: download-tf
+      run: |
+        mkdir -p download
+        cd download
+        wget https://storage.googleapis.com/tensorflow/libtensorflow/libtensorflow-cpu-linux-x86_64-1.15.0.tar.gz
+        tar xvf libtensorflow-cpu-linux-x86_64-1.15.0.tar.gz
+
+    - name: test
+      run: |
+        source $(curl https://dlang.org/install.sh | bash -s -- ${{ matrix.compiler }} -a)
+        LIBRARY_PATH=`pwd`/download/lib
+        LD_LIBRARY_PATH=`pwd`/download/lib
+        dub test --parallel -b=unittest-cov
+
+    - name: codecov
+      if: ${{ matrix.compiler == 'dmd' }}
+      run: bash <(curl -s https://codecov.io/bash)
diff --git a/.github/workflows/ci.yml b/.github/workflows/windows.yml
similarity index 51%
rename from .github/workflows/ci.yml
rename to .github/workflows/windows.yml
index 77daaa0..7e426d3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/windows.yml
@@ -3,42 +3,7 @@ name: CI
 on: [push]
 
 jobs:
-  test-linux:
-
-    runs-on: ubuntu-18.04
-
-    strategy:
-      fail-fast: false
-      max-parallel: 4
-      matrix:
-        compiler: [dmd, ldc, dmd-beta, ldc-beta]
-
-    steps:
-    - uses: actions/checkout@v1
-      # with:
-      #   submodules: true
-
-    - name: download-tf
-      run: |
-        mkdir -p download
-        cd download
-        wget https://storage.googleapis.com/tensorflow/libtensorflow/libtensorflow-cpu-linux-x86_64-1.15.0.tar.gz
-        tar xvf libtensorflow-cpu-linux-x86_64-1.15.0.tar.gz
-
-    - name: test
-      run: |
-        source $(curl https://dlang.org/install.sh | bash -s -- ${{ matrix.compiler }} -a)
-        LIBRARY_PATH=`pwd`/download/lib
-        LD_LIBRARY_PATH=`pwd`/download/lib
-        dub test --parallel -b=unittest-cov
-
-    - name: codecov
-      if: ${{ matrix.compiler == 'dmd' }}
-      run: bash <(curl -s https://codecov.io/bash)
-
-
-  test-windows:
-
+  test:
     runs-on: windows-2019
 
     strategy:
@@ -49,8 +14,6 @@ jobs:
 
     steps:
     - uses: actions/checkout@v1
-      # with:
-      #   submodules: true
 
     - name: download-tf
       run: |
diff --git a/Makefile b/Makefile
deleted file mode 100644
index 0614c6c..0000000
--- a/Makefile
+++ /dev/null
@@ -1,46 +0,0 @@
-PROTOC_VERSION := 1.3.3
-
-.PHONY: all clean
-
-all: source/tfd/c_api.d # generated/tensorflow/op_def_pb.d generated/lib/libtensorflow_pb.a
-
-# Generate D bindings
-%.d: %.dpp download/include/tensorflow/c/c_api.h
-	dub run dpp -- --preprocess-only --include-path ./download/include $<
-
-generated/tensorflow/c_api.d: download/include/tensorflow/c/c_api.h
-	bash ./dpp.sh tensorflow/c/c_api.h $@ tensorflow.c_api
-
-generated/tensorflow/op_def_pb.d: generated/tensorflow/core/framework/op_def.pb-c.h
-	bash ./dpp.sh tensorflow/core/framework/op_def.pb-c.h $@ tensorflow.op_def_pb
-
-
-# Download deps
-download/include/tensorflow/c/c_api.h:
-	mkdir -p download
-	cd download && wget https://storage.googleapis.com/tensorflow/libtensorflow/libtensorflow-cpu-linux-x86_64-1.15.0.tar.gz
-	cd download && tar xvf libtensorflow-cpu-linux-x86_64-1.15.0.tar.gz
-
-download/bin/protoc-c:
-	mkdir -p download
-	cd download && wget https://github.com/protobuf-c/protobuf-c/releases/download/v$(PROTOC_VERSION)/protobuf-c-$(PROTOC_VERSION).tar.gz
-	cd download && tar xvf protobuf-c-$(PROTOC_VERSION).tar.gz
-	cd download/protobuf-c-$(PROTOC_VERSION) && ./configure --prefix=$(PWD)/download && make -j4 && make install
-
-
-# Generate ProtocolBuffer in C
-generated/tensorflow/core/framework/op_def.pb-c.h: download/include/tensorflow/c/c_api.h download/bin/protoc-c
-	mkdir -p generated
-	cd tensorflow && ../download/bin/protoc-c --c_out=../generated tensorflow/core/framework/*.proto
-
-generated/lib/libtensorflow_pb.a: generated/tensorflow/core/framework/op_def.pb-c.h
-	mkdir -p generated/lib
-	cd generated/lib && gcc -c ../tensorflow/core/framework/*.c -I.. -I../../download/include && ar rcs libtensorflow_pb.a *.o && rm *.o
-
-
-clean:
-	dub clean
-	rm -rfv generated
-
-test: all
-	LIBRARY_PATH=`pwd`/download/lib && LD_LIBRARY_PATH=`pwd`/download/lib && dub test --parallel -b=unittest-cov
diff --git a/README.md b/README.md
index 88fd784..dd1f11d 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # tfd: tensorflow for D
 
-![CI](https://github.com/ShigekiKarita/tfd/workflows/CI/badge.svg)
+[![linux](https://github.com/ShigekiKarita/tfd/workflows/linux/badge.svg)](https://github.com/ShigekiKarita/tfd/actions?query=workflow:linux)
+[![windows](https://github.com/ShigekiKarita/tfd/workflows/windows/badge.svg)](https://github.com/ShigekiKarita/tfd/actions?query=workflow:windows)
 [![codecov](https://codecov.io/gh/ShigekiKarita/tfd/branch/master/graph/badge.svg)](https://codecov.io/gh/ShigekiKarita/tfd)
 [![Dub version](https://img.shields.io/dub/v/tfd.svg)](https://code.dlang.org/packages/tfd)
 
diff --git a/dpp.sh b/dpp.sh
deleted file mode 100755
index 16b7cca..0000000
--- a/dpp.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-#!bash
-
-set -euo
-
-# e.g., tensorflow/c/c_api.h
-cfile=$1
-# e.g., generated/tensorflow/c_api.d
-dfile=$2
-# e.g., tensorflow.c_api
-dmodule=$3
-mkdir -p $(dirname $dfile)
-echo "module ${dmodule};
-#include <${cfile}>" > ${dfile}pp
-
-# dub fetch dpp
-dub run dpp -- --preprocess-only \
-  --include-path ./download/include \
-  --include-path ./generated \
-  --include-path tensorflow/ ${dfile}pp