diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..b50f0bc
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,3 @@
+addons/godot_xterm/native/external/*
+addons/godot_xterm/native/bin/**/*
+addons/godot_xterm/native/.sconsign*.dblite
diff --git a/.gitmodules b/.gitmodules
index 9af9d15..892bf69 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,5 +4,3 @@
 [submodule "addons/godot_xterm/libtsm"]
 	path = addons/godot_xterm/native/external/libtsm
 	url = https://github.com/Aetf/libtsm
-[submodule "godot-cpp/"]
-	url = https://github.com/godotengine/godot-cpp
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0f3eb0..a64e17a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- Updated build script (`addons/godot_xterm/native/build.sh`). Git submodules will now be initialized if they haven't already. Moved nix-shell related stuff to a seperate shell.nix file so the same build command can be used on all Linux based OSes.
 
 ## [1.0.0] - 2020-10-05
 ### Added
diff --git a/README.md b/README.md
index 78f2a21..530d596 100644
--- a/README.md
+++ b/README.md
@@ -17,38 +17,34 @@ Terminal emulator for Godot using GDNative and [libtsm](https://github.com/Aetf/
 
 ### All Operating Systems
 
-**Important**: The main dependencies of this project are included as git submodules.
-You can install them in this repo after cloning with:
-```
-git submodule update --init --recursive
-```
-In addition to these, you will need some other dependencies including:
+You will need at least these dependencies in order to build this plugin:
+- Git (for git submodules)
 - a C++ compiler (e.g. gcc)
 - ar (part of GNU Binutils)
 - CMake
 - Python
 - SCons
 
-### Operating System Specific
+### Linux
 
 #### NixOS
-On NixOS you can simply run the [build.sh] script in the `addons/godot_xterm/native` directory:
+You can simply run the [build.sh] script in the `addons/godot_xterm/native` directory:
 ```
-cd addons/godot_xterm/native
-./build.sh
+addons/godot_xterm/native/build.sh
 ```
 All dependencies will be pulled in by nix-shell and the build steps will run.
 
 #### Arch Linux and Ubuntu
-See the [Arch Linux Dockerfile](dockerfiles/archlinux) and [Ubuntu Dockerfile](dockerfiles/ubuntu) for a list of packages that need to be installed. Once installed, run the [build.sh] script from the `addons/godot_xterm/native` directory:
+See the [Arch Linux Dockerfile](dockerfiles/archlinux) and [Ubuntu Dockerfile](dockerfiles/ubuntu) for a list of packages that need to be installed. Once installed, run the [build.sh] script in the `addons/godot_xterm/native` directory:
 ```
-cd addons/godot_xterm/native
-bash ./build.sh
+addons/godot_xterm/native/build.sh
 ```
-Make sure you use `bash` to run the script as the default interpreter is set to nix-shell. 
 
-#### Other
-Other operating systems will probably be similar to the above. When in doubt check the documentation in the submodule repos, the [build.sh] script, and the [SConstruct] file.
+#### Other Linux Distributions
+Will probably be similar to the above. When in doubt check the documentation in the submodule repos, the [build.sh] script, and the [SConstruct] file.
+
+### Other Operating Systems
+This plugin is not currently supported for other operating systems (e.g. MacOS, Windows). If you manage to build it on one of these platforms, please submit a PR for this readme.
 
 ## Usage
 
diff --git a/addons/godot_xterm/native/bin/x11/libgodotxtermnative.so.REMOVED.git-id b/addons/godot_xterm/native/bin/x11/libgodotxtermnative.so.REMOVED.git-id
index e2e41f4..f6f960f 100644
--- a/addons/godot_xterm/native/bin/x11/libgodotxtermnative.so.REMOVED.git-id
+++ b/addons/godot_xterm/native/bin/x11/libgodotxtermnative.so.REMOVED.git-id
@@ -1 +1 @@
-1dcc20e0ef6e62c4371e3345e33bef19229c471a
\ No newline at end of file
+a17dbf3cdfca56910de1517e42a39770c19aef81
\ No newline at end of file
diff --git a/addons/godot_xterm/native/build.sh b/addons/godot_xterm/native/build.sh
index 874527c..baf1c4a 100755
--- a/addons/godot_xterm/native/build.sh
+++ b/addons/godot_xterm/native/build.sh
@@ -1,28 +1,37 @@
-#! /usr/bin/env nix-shell
-#! nix-shell -i bash --pure -p binutils.bintools cmake scons
+#!/bin/sh
 set -e
 
-# Make sure we are in the addons/godot_xterm directory
-cd ${BASH_SOURCE%/*}
+# Get the absolute path to the directory this script is in.
+NATIVE_DIR="$( cd "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
 
-# Initialize godot-cpp
-if [ ! -d "external/godot-cpp/bin" ]
-then
-	cd external/godot-cpp
-	scons platform=linux generate_bindings=yes -j12
-	cd ../..
+# 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 shell.nix --pure --run "./build.sh"
+	exit
 fi
 
-# Build libtsm
-if [ ! -f "external/libtsm/build/src/tsm/libtsm.a" ]
-then
-	cd external/libtsm
-	mkdir -p build
-	cd build
-	cmake -DBUILD_SHARED_LIBS=n ..
-	make
-	cd ../../..
+# Build libtsm.
+LIBTSM_DIR=${NATIVE_DIR}/external/libtsm
+if [ ! -d "$LIBTSM_DIR" ]; then
+	cd ${NATIVE_DIR}
+	git submodule update --init --recursive -- $LIBTSM_DIR
 fi
+cd $LIBTSM_DIR
+mkdir -p build
+cd build
+cmake -DBUILD_SHARED_LIBS=n ..
+make
 
-# Build godotxtermnative
+# Build godot-cpp.
+GODOT_CPP_DIR=${NATIVE_DIR}/external/godot-cpp
+if [ ! -d "${GODOT_CPP_DIR}" ]; then
+	cd ${NATIVE_DIR}
+	git submodule update --init --recursive -- $GODOT_CPP_DIR
+fi
+cd $GODOT_CPP_DIR
+scons platform=linux generate_bindings=yes -j12
+
+# Build godotxtermnative.
+cd ${NATIVE_DIR}
 scons platform=linux
diff --git a/addons/godot_xterm/native/shell.nix b/addons/godot_xterm/native/shell.nix
new file mode 100644
index 0000000..abcd05d
--- /dev/null
+++ b/addons/godot_xterm/native/shell.nix
@@ -0,0 +1,11 @@
+with (import <nixpkgs> {});
+mkShell {
+  buildInputs = with pkgs; [
+    binutils.bintools
+    cmake
+    git
+    libxkbcommon
+    pkg-config
+    scons
+  ];
+}
diff --git a/docker-compose.yml b/docker-compose.yml
index c060d05..ce0fc40 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,7 +4,7 @@ services:
     build:
       context: .
       dockerfile: ./dockerfiles/archlinux
-    command: bash /src/addons/godot_xterm/native/build.sh
+    command: /src/addons/godot_xterm/native/build.sh
   build-nixos:
     build:
       context: .
@@ -14,4 +14,4 @@ services:
     build:
       context: .
       dockerfile: ./dockerfiles/ubuntu
-    command: bash /src/addons/godot_xterm/native/build.sh
+    command: /src/addons/godot_xterm/native/build.sh
diff --git a/dockerfiles/archlinux b/dockerfiles/archlinux
index c6d2d63..9b4b559 100644
--- a/dockerfiles/archlinux
+++ b/dockerfiles/archlinux
@@ -1,3 +1,7 @@
 FROM archlinux:20200908
-RUN pacman -Sy --needed --noconfirm base-devel cmake scons
+RUN pacman -Sy --needed --noconfirm \
+    base-devel \
+    cmake \
+    git \
+    scons
 COPY . /src
diff --git a/dockerfiles/ubuntu b/dockerfiles/ubuntu
index 55e70a0..d48b4cd 100644
--- a/dockerfiles/ubuntu
+++ b/dockerfiles/ubuntu
@@ -1,4 +1,8 @@
 FROM ubuntu:18.04
-RUN apt-get update -y
-RUN apt-get install -y build-essential cmake python3 scons
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    cmake \
+    git \
+    python3 \
+    scons
 COPY . /src