diff --git a/.dockerignore b/.dockerignore
index b50f0bc..b7c36ec 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,3 +1,3 @@
 addons/godot_xterm/native/external/*
-addons/godot_xterm/native/bin/**/*
+addons/godot_xterm/native/bin/*
 addons/godot_xterm/native/.sconsign*.dblite
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..81340a2
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,27 @@
+name: build
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build-nixos:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build for supported platforms on NixOS
+        run: docker-compose run build-nixos
+  build-archlinux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build for supported platforms on Arch Linux
+        run: docker-compose run build-archlinux
+  build-ubuntu:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build for supported platforms on Ubuntu
+        run: docker-compose run build-ubuntu
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 6062dd6..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-language: nix
-
-services:
-- docker
-
-jobs:
-  include:
-    - name: "Build native libs on Arch Linux"
-      env: SERVICE=build-archlinux
-    - name: "Build native libs on NixOS"
-      env: SERVICE=build-nixos
-    - name: "Build native libs on Ubuntu"
-      env: SERVICE=build-ubuntu
-
-script: docker-compose run $SERVICE
diff --git a/README.md b/README.md
index 43bf8ca..a7e2f96 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 ![Version](https://img.shields.io/badge/version-0.1.0-orange.svg)
 ![Godot Version](https://img.shields.io/badge/godot-3.2+-blue.svg)
 ![License](https://img.shields.io/badge/license-MIT-green.svg)
-[![Build Status](https://travis-ci.com/lihop/godot-xterm.svg?branch=master)](https://travis-ci.com/lihop/godot-xterm)
+[![Build Status](https://github.com/lihop/godot-xterm/workflows/build/badge.svg?branch=master)](https://github.com/lihop/godot-xterm/actions?query=branch%3Amaster)
 
 Terminal emulator for Godot using GDNative and [libtsm](https://github.com/Aetf/libtsm).
 
diff --git a/addons/godot_xterm/native/build.sh b/addons/godot_xterm/native/build.sh
index f019bac..654a80a 100755
--- a/addons/godot_xterm/native/build.sh
+++ b/addons/godot_xterm/native/build.sh
@@ -9,7 +9,7 @@ NATIVE_DIR="$( cd "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
 # Run script inside a nix shell if it is available.
 if command -v nix-shell && [ $NIX_PATH ] && [ -z $IN_NIX_SHELL ]; then
 	cd ${NATIVE_DIR}
-	nix-shell --pure --command "./build.sh $1"
+	nix-shell --pure --run "NIX_PATH=${NIX_PATH} ./build.sh $1"
 	exit
 fi
 
@@ -34,7 +34,9 @@ case $1 in
 		# Cross-compile release build for all platforms.
 		scons platform=linux bits=64 target=release -j$(nproc)
 		if [ $IN_NIX_SHELL ]; then
-			nix-shell --pure --argstr system i686-linux --run 'scons platform=linux bits=32 target=release -j$(nproc)'
+			nix-shell --pure --argstr system i686-linux --run "NIX_PATH=${NIX_PATH} scons platform=linux bits=32 target=release -j$(nproc)"
+		else
+			scons platform=linux bits=32 target=release -j$(nproc)
 		fi
 		scons platform=windows bits=64 target=release -j$(nproc)
 		#scons platform=windows bits=32 target=release -j$(nproc)
diff --git a/addons/godot_xterm/native/shell.nix b/addons/godot_xterm/native/shell.nix
index ef605ae..9a7b488 100644
--- a/addons/godot_xterm/native/shell.nix
+++ b/addons/godot_xterm/native/shell.nix
@@ -6,6 +6,7 @@ with (import <nixpkgs> {
 mkShell {
   buildInputs = with pkgs; [
     binutils.bintools
+    cacert
     cmake
     git
     libxkbcommon
diff --git a/docker-compose.yml b/docker-compose.yml
index 1c387de..d8a7330 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,7 +4,7 @@ services:
     build:
       context: .
       dockerfile: ./dockerfiles/archlinux
-    command: /src/addons/godot_xterm/native/build.sh
+    command: /src/addons/godot_xterm/native/build.sh release-all
   build-nixos:
     build:
       context: .
@@ -14,4 +14,4 @@ services:
     build:
       context: .
       dockerfile: ./dockerfiles/ubuntu
-    command: /src/addons/godot_xterm/native/build.sh
+    command: /src/addons/godot_xterm/native/build.sh release-all
diff --git a/dockerfiles/archlinux b/dockerfiles/archlinux
index 9b4b559..0f6c457 100644
--- a/dockerfiles/archlinux
+++ b/dockerfiles/archlinux
@@ -1,7 +1,14 @@
 FROM archlinux:20200908
 RUN pacman -Sy --needed --noconfirm \
-    base-devel \
-    cmake \
+    # The following are required to compile for any platform:
     git \
-    scons
+    scons \
+    # The following are required to compile for 64-bit Linux:
+    base-devel \
+    # The following are required to compile for 32-bit Linux:
+    multilib-devel \
+    # The following is required to cross-compile for 32/64-bit Windows:
+    mingw-w64-gcc \
+    # The following is required to cross-compile for MacOS:
+    clang
 COPY . /src
diff --git a/dockerfiles/ubuntu b/dockerfiles/ubuntu
index d48b4cd..b74e52c 100644
--- a/dockerfiles/ubuntu
+++ b/dockerfiles/ubuntu
@@ -1,8 +1,16 @@
 FROM ubuntu:18.04
 RUN apt-get update && apt-get install -y \
-    build-essential \
-    cmake \
+    # The following are required to compile for any platform:
     git \
     python3 \
-    scons
+    scons \
+    # The following are required to compile for 64-bit Linux:
+    build-essential \
+    # The following are required to compile for 32-bit Linux:
+    gcc-multilib \
+    g++-multilib \
+    # The following is required to cross-compile for 32/64-bit Windows:
+    g++-mingw-w64-x86-64 \
+    # The following is required to cross-compile for MacOS:
+    clang
 COPY . /src