diff --git a/.cargo/config b/.cargo/config
new file mode 100644
index 0000000..d068de8
--- /dev/null
+++ b/.cargo/config
@@ -0,0 +1,8 @@
+[target.aarch64-unknown-linux-musl]
+linker = "aarch64-linux-gnu-gcc"
+
+[target.armv7-unknown-linux-musleabi]
+linker = "arm-linux-gnueabi-gcc"
+
+[target.arm-unknown-linux-musleabi]
+linker = "arm-linux-gnueabi-gcc"
diff --git a/.earthignore b/.earthignore
index 081efbc..1915b01 100644
--- a/.earthignore
+++ b/.earthignore
@@ -1,3 +1,4 @@
 *
 !/src
 !/Cargo.*
+!/.cargo
diff --git a/Cargo.toml b/Cargo.toml
index 8c24899..4a84715 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,25 +14,3 @@ tui = "0.14"
 termion = "1.5"
 serde = {version = "1.0", features = ["derive"]}
 confy = "0.4.0"
-
-#[target.arm-linux-linux-muxl]
-#linker = "arm-linux-unknown-gcc"
-
-[target.aarch64-linux-musl]
-linker = "aarch64-linux-gnu-gcc"
-
-[target.aarch64-unknown-linux-musl]
-linker = "aarch64-linux-gnu-gcc"
-
-[target.aarch64-unknown-linux-gcc]
-linker = "aarch64-linux-gnu-gcc"
-
-# TODO: cross compilation
-# [target.arm-unknown-linux-gnueabihf]
-# linker = "arm-linux-gnueabihf-gcc"
-
-# [target.armv7-unknown-linux-musleabi]
-# linker = "armv7-unknown-linux-musleabi-gcc"
-
-# [target.aarch64-unknown-linux-musl]
-# linker = "aarch64-unknown-linux-musl-gcc"
diff --git a/build.earth b/build.earth
index 65139eb..2dcdd5a 100644
--- a/build.earth
+++ b/build.earth
@@ -1,34 +1,47 @@
 FROM rust:latest
 ENV CARGO_HOME=/deps
+ARG APP_NAME=rpn_rs
 WORKDIR /work
-RUN apt-get update
-RUN apt-get install -y gcc-arm-linux-gnueabi gcc-aarch64-linux-gnu gdb-mingw-w64 gcc-mingw-w64-x86-64
 
 deps:
 	COPY ./Cargo.toml ./Cargo.lock .
+	# This is a binary program, expose a main.rs file
 	RUN mkdir src && touch src/main.rs
 	RUN cargo fetch
 	SAVE ARTIFACT /deps
 
-build:
-	ARG TOOLCHAIN
-	RUN rustup target add $TOOLCHAIN
-	SAVE IMAGE docker-wg:5000/rust-builder:$TOOLCHAIN
+rust-builder:
+	RUN rustup target add x86_64-unknown-linux-musl
+	RUN rustup target add x86_64-pc-windows-gnu
+	RUN rustup target add i686-unknown-linux-musl
+	RUN rustup target add aarch64-unknown-linux-musl
+	RUN rustup target add arm-unknown-linux-musleabi
+	RUN rustup target add armv7-unknown-linux-musleabi
 
+	RUN apt-get update
+	RUN DEBIAN_FRONTEND=noninteractive apt-get install -y gcc-arm-linux-gnueabi gcc-aarch64-linux-gnu gdb-mingw-w64 gcc-mingw-w64-x86-64
+
+	SAVE IMAGE docker-wg:5000/rust-builder
+
+build:
+	FROM +rust-builder
+	COPY . .
 	COPY +deps/deps /deps
-	COPY ./Cargo.toml ./Cargo.lock .
-	COPY ./src/ ./src/
+
+	ARG TOOLCHAIN
+
 	RUN cargo build --release --target "$TOOLCHAIN"
-	RUN strip "target/$TOOLCHAIN/release/rpn_rs"
-	RUN xz --keep "target/$TOOLCHAIN/release/rpn_rs"
-	SAVE ARTIFACT target/$TOOLCHAIN/release/rpn_rs AS LOCAL target/$TOOLCHAIN/release/rpn_rs-$TOOLCHAIN
-	SAVE ARTIFACT target/$TOOLCHAIN/release/rpn_rs.xz AS LOCAL target/$TOOLCHAIN/release/rpn_rs-$TOOLCHAIN.xz
+	ARG STRIP_CMD
+	RUN "$STRIP_CMD" "target/$TOOLCHAIN/release/$APP_NAME"
+	RUN xz --keep "target/$TOOLCHAIN/release/$APP_NAME"
+	SAVE ARTIFACT target/$TOOLCHAIN/release/$APP_NAME AS LOCAL target/$TOOLCHAIN/release/$APP_NAME-$TOOLCHAIN
+	SAVE ARTIFACT target/$TOOLCHAIN/release/$APP_NAME.xz AS LOCAL target/$TOOLCHAIN/release/$APP_NAME-$TOOLCHAIN.xz
 
 all:
-	BUILD --build-arg TOOLCHAIN=x86_64-unknown-linux-musl +build
-	BUILD --build-arg TOOLCHAIN=i686-unknown-linux-musl +build
+	BUILD --build-arg TOOLCHAIN=x86_64-unknown-linux-musl    --build-arg STRIP_CMD=x86_64-linux-gnu-strip  +build
+	BUILD --build-arg TOOLCHAIN=i686-unknown-linux-musl      --build-arg STRIP_CMD=x86_64-linux-gnu-strip  +build
+	BUILD --build-arg TOOLCHAIN=aarch64-unknown-linux-musl   --build-arg STRIP_CMD=aarch64-linux-gnu-strip +build
+	BUILD --build-arg TOOLCHAIN=arm-unknown-linux-musleabi   --build-arg STRIP_CMD=arm-linux-gnueabi-strip +build
+	BUILD --build-arg TOOLCHAIN=armv7-unknown-linux-musleabi --build-arg STRIP_CMD=arm-linux-gnueabi-strip +build
+	# TODO: Cross compile to windows
 	# BUILD --build-arg TOOLCHAIN=x86_64-pc-windows-gnu +build
-	# TODO: Cross compile
-	# BUILD --build-arg TOOLCHAIN=aarch64-unknown-linux-musl +build
-	# BUILD --build-arg TOOLCHAIN=arm-unknown-linux-musleabi +build
-	# BUILD --build-arg TOOLCHAIN=armv7-unknown-linux-musleabi +build