diff --git a/.cargo/config.toml b/.cargo/config.toml
index a64d5bd..03b1d63 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,5 +1,3 @@
-[build]
-target = "thumbv4-none-agb.json"
-
-[unstable]
-build-std = ["core"]
+[target.thumbv4t-none-eabi]
+rustflags = ["-Clink-arg=-Tlinker.ld"]
+runner = "mgba"
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 785f5ae..4827387 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -6,44 +6,40 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
-    container: devkitpro/devkitarm:latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         rust:
           - { toolchain: nightly }
     steps:
-      - uses: actions/checkout@v2
-      - name: Add devkitARM bin to PATH
-        run: echo "/opt/devkitpro/devkitARM/bin" >> $GITHUB_PATH
       - name: Install Apt Dependencies
-        run: apt-get update && apt-get install -y --no-install-recommends build-essential libssl-dev
+        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends build-essential libssl-dev binutils-arm-none-eabi
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.rust.toolchain }}
           default: true
-      - uses: Swatinem/rust-cache@v1
       - name: Install Rust Source
         run: rustup component add rust-src
-      - name: Install cargo-xbuild crate
-        uses: actions-rs/install@v0.1
-        with:
-          crate: cargo-xbuild
-          version: latest
-          use-tool-cache: true
       - name: Install cargo-make crate
         uses: actions-rs/install@v0.1
         with:
           crate: cargo-make
           version: latest
           use-tool-cache: true
-      - name: Make Test Linux
+      - name: Install gbafix crate
+        uses: actions-rs/install@v0.1
+        with:
+          crate: gbafix
+          version: latest
+          use-tool-cache: true
+      - uses: actions/checkout@v2
+      - name: Make Test
         uses: actions-rs/cargo@v1
         with:
           toolchain: ${{ matrix.rust.toolchain }}
           command: make
-          args: test linux
+          args: test
       - name: Make Release
         uses: actions-rs/cargo@v1
         with:
diff --git a/Cargo.toml b/Cargo.toml
index e08658e..76cf1ed 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,6 +22,12 @@ gba-proc-macro = "0.5"
 embedded-hal = { version = "0.2.4", optional = true }
 nb = { version = "1.0.0", optional = true }
 
+[profile.dev]
+lto = false
+panic = "abort"
+incremental = false
+codegen-units = 1
+
 [profile.release]
 lto = true
 panic = "abort"
diff --git a/Makefile.toml b/Makefile.toml
index db6222d..ddfea61 100644
--- a/Makefile.toml
+++ b/Makefile.toml
@@ -1,55 +1,70 @@
 [config]
 skip_core_tasks = true
 
-[tasks.create-target-dir]
+[tasks.verify-toolchain]
 script_runner = "@duckscript"
-script = [ "mkdir ./target/" ]
+script = [
+'''
+channel = get_env CARGO_MAKE_RUST_CHANNEL
+assert_eq ${channel} nightly "Rust toolchain must be set to nightly"
+'''
+]
 
-[tasks.assemble]
-dependencies = ["create-target-dir"]
-command = "arm-none-eabi-as"
-args = ["crt0.s", "-o", "target/crt0.o"]
 
 [tasks.build-examples-debug]
-dependencies = ["assemble"]
+dependencies = ["verify-toolchain"]
 command = "cargo"
-args = ["build", "--examples"]
+args = ["build", "--examples", "--target=thumbv4t-none-eabi", "-Zbuild-std=core"]
 
 [tasks.build-examples-release]
-dependencies = ["assemble"]
+dependencies = ["verify-toolchain"]
 command = "cargo"
-args = ["build", "--examples", "--release"]
+args = ["build", "--examples", "--release", "--target=thumbv4t-none-eabi", "-Zbuild-std=core"]
 
 [tasks.pack-roms]
 script_runner = "@duckscript"
 script = [
 '''
+release_target = get_env RELEASE_TARGET
+examples_path = set ./target/thumbv4t-none-eabi/${release_target}/examples
 examples = glob_array ./examples/*.rs
 for example in ${examples}
     example = substring ${example} -3
     example = basename ${example}
-    exec arm-none-eabi-objcopy -O binary ./target/thumbv4-none-agb/release/examples/${example} ./target/${example}.gba
+    binary_exists = is_path_exists ${examples_path}/${example}
+
+    if ${binary_exists}
+        echo "Packing: ${examples_path}/${example} to ${examples_path}/${example}.gba"
+        exec arm-none-eabi-objcopy -O binary ${examples_path}/${example} ${examples_path}/${example}.gba
+        echo "Fixing headers: ${examples_path}/${example}.gba"
+        exec gbafix ${examples_path}/${example}.gba
+    else
+        echo "Binary does not exist: ${examples_path}/${example}"
+    end
 end
 '''
 ]
 
-[tasks.test.linux]
-command = "cargo"
-args = ["test", "--lib", "--target", "x86_64-unknown-linux-gnu", "-Z", "build-std"]
+[tasks.pack-roms-release]
+dependencies = ["build-examples-release"]
+env = { RELEASE_TARGET = "release" }
+run_task = "pack-roms"
 
-[tasks.test.windows]
-command = "cargo"
-args = ["test", "--lib", "--target", "x86_64-pc-windows-msvc", "-Z", "build-std"]
+[tasks.pack-roms-debug]
+dependencies = ["build-examples-debug"]
+env = { RELEASE_TARGET = "debug" }
+run_task = "pack-roms"
 
-[tasks.test.mac]
+[tasks.test]
+dependencies = ["verify-toolchain"]
 command = "cargo"
-args = ["test", "--lib", "--target", "x86_64-apple-darwin", "-Z", "build-std"]
+args = ["test", "--lib"]
 
 [tasks.justrelease]
-dependencies = ["build-examples-release", "pack-roms"]
+dependencies = ["pack-roms-release"]
 
 [tasks.build-all]
-dependencies = ["build-examples-debug", "build-examples-release", "pack-roms"]
+dependencies = ["pack-roms-debug", "pack-roms-release"]
 
 [tasks.default]
 alias = "build-all"
diff --git a/README.md b/README.md
index 412808c..2d4461e 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 [![License:Apache2](https://img.shields.io/badge/License-Apache2-green.svg)](https://www.apache.org/licenses/LICENSE-2.0)
-[![travis.ci](https://travis-ci.org/rust-console/gba.svg?branch=master)](https://travis-ci.org/rust-console/gba)
+[![ci](https://github.com/rust-console/gba/workflows/ci/badge.svg?branch=master)](https://github.com/rust-console/gba/actions?query=workflow%3Aci)
 [![crates.io](https://img.shields.io/crates/v/gba.svg)](https://crates.io/crates/gba)
 [![docs.rs](https://docs.rs/gba/badge.svg)](https://docs.rs/gba/latest/gba/)
 
@@ -22,6 +22,29 @@ The following major GBA features are still missing from the crate:
 * Interrupt Handling
 * Serial Communication
 
+## Build Dependencies
+
+Install required cargo packages
+```sh
+rustup install nightly
+rustup +nightly component add rust-src
+cargo install cargo-make
+cargo install gbafix
+```
+
+Install arm build tools
+* Ubuntu
+  ```shell
+  sudo apt-get install binutils-arm-none-eabi
+  ```
+* OSX
+  ```shell
+  brew install --cask gcc-arm-embedded
+  ```
+* Windows
+  * Download the [GNU Arm Embedded Toolchain](https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads)
+  * Install the toolchain, make sure to select "Add path to environment variable" during install
+
 ## First Time Setup
 
 Writing a Rust program for the GBA requires a fair amount of special setup. All
diff --git a/bors.toml b/bors.toml
deleted file mode 100644
index 359f894..0000000
--- a/bors.toml
+++ /dev/null
@@ -1 +0,0 @@
-status = ["continuous-integration/travis-ci/push"]
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..9424dba
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,17 @@
+fn main() {
+    let out_file = "rsrt0.o";
+    let out_dir = std::env::var("OUT_DIR").unwrap();
+    let out_dir_file = format!("{}/{}", out_dir, out_file);
+    let as_output = std::process::Command::new("arm-none-eabi-as")
+        .args(&["-o", out_dir_file.as_str()])
+        .arg("-mthumb-interwork")
+        .arg("-mcpu=arm7tdmi")
+        .arg("src/rsrt0.S")
+        .output()
+        .expect("failed to run arm-none-eabi-as");
+    if !as_output.status.success() {
+        panic!("{}", String::from_utf8_lossy(&as_output.stderr));
+    }
+    //
+    println!("cargo:rustc-link-search={}", out_dir);
+}
\ No newline at end of file
diff --git a/linker.ld b/linker.ld
index 0be97b2..47bdfab 100644
--- a/linker.ld
+++ b/linker.ld
@@ -8,7 +8,7 @@ MEMORY {
 
 SECTIONS {
     .text : {
-        KEEP(target/crt0.o(.text));
+        KEEP(rsrt0.o(.text));
         *(.text .text.*);
         . = ALIGN(4);
     } >rom = 0xff
diff --git a/src/io/irq.rs b/src/io/irq.rs
index 533099d..f225629 100644
--- a/src/io/irq.rs
+++ b/src/io/irq.rs
@@ -6,7 +6,7 @@
 //! pointer and execution will jump to the user interrupt handler starting at
 //! `0x0300_7FFC`, in ARM mode.
 //!
-//! Currently, the user interrupt handler is defined in `crt0.s`. It is set up
+//! Currently, the user interrupt handler is defined in `rsrt0.S`. It is set up
 //! to execute a user-specified interrupt handler after saving some registers.
 //! This handler is declared as a static function pointer on the Rust side, and
 //! can be set by using [`set_irq_handler`](irq::set_irq_handler).
@@ -27,7 +27,7 @@
 //!   This is done by setting the corresponding IRQ flag on
 //!   [`BIOS_IF`](irq::BIOS_IF) at the end of the interrupt handler.
 //! * You can change the low-level details of the interrupt handler by editing
-//!   the `MainIrqHandler` routine in `crt0.s`. For example, you could declare
+//!   the `MainIrqHandler` routine in `rsrt0.S`. For example, you could declare
 //!   an external static variable in Rust holding a table of interrupt function
 //!   pointers and jump directly into one of them in assembly, without the need
 //!   to write the branching logic in Rust. However, note that the main
@@ -78,7 +78,7 @@
 //!
 //! ## Implementation Details
 //!
-//! This is the setup the provided user interrupt handler in `crt0.s` will do
+//! This is the setup the provided user interrupt handler in `rsrt0.S` will do
 //! when an interrupt is received, in order. It is based on the _Recommended
 //! User Interrupt Handling_ portion of the GBATEK reference.
 //!
@@ -136,7 +136,7 @@ pub const IE: VolAddress<IrqFlags> = unsafe { VolAddress::new(0x400_0200) };
 ///
 /// The main user interrupt handler will acknowledge the interrupt that was set
 /// by writing to this register, so there is usually no need to modify it.
-/// However, if the main interrupt handler in `crt0.s` is changed, then the
+/// However, if the main interrupt handler in `rsrt0.S` is changed, then the
 /// handler must write a `1` bit to all bits that are enabled on this register
 /// when it is called.
 pub const IF: VolAddress<IrqFlags> = unsafe { VolAddress::new(0x400_0202) };
@@ -185,7 +185,7 @@ pub fn set_irq_handler(handler: IrqHandler) {
 
 extern "C" fn default_handler(_flags: IrqFlags) {}
 
-// Inner definition of the interrupt handler. It is referenced in `crt0.s`.
+// Inner definition of the interrupt handler. It is referenced in `rsrt0.S`.
 #[doc(hidden)]
 #[no_mangle]
 static mut __IRQ_HANDLER: IrqHandler = default_handler;
diff --git a/crt0.s b/src/rsrt0.S
similarity index 59%
rename from crt0.s
rename to src/rsrt0.S
index 06aceb4..b45e64f 100644
--- a/crt0.s
+++ b/src/rsrt0.S
@@ -2,46 +2,8 @@
 __start:
     b .Linit
 
-    @ ROM header
-    .byte 0x24,0xff,0xae,0x51,0x69,0x9a,0xa2,0x21,0x3d,0x84,0x82,0x0a,0x84,0xe4,0x09,0xad
-    .byte 0x11,0x24,0x8b,0x98,0xc0,0x81,0x7f,0x21,0xa3,0x52,0xbe,0x19,0x93,0x09,0xce,0x20
-    .byte 0x10,0x46,0x4a,0x4a,0xf8,0x27,0x31,0xec,0x58,0xc7,0xe8,0x33,0x82,0xe3,0xce,0xbf
-    .byte 0x85,0xf4,0xdf,0x94,0xce,0x4b,0x09,0xc1,0x94,0x56,0x8a,0xc0,0x13,0x72,0xa7,0xfc
-    .byte 0x9f,0x84,0x4d,0x73,0xa3,0xca,0x9a,0x61,0x58,0x97,0xa3,0x27,0xfc,0x03,0x98,0x76
-    .byte 0x23,0x1d,0xc7,0x61,0x03,0x04,0xae,0x56,0xbf,0x38,0x84,0x00,0x40,0xa7,0x0e,0xfd
-    .byte 0xff,0x52,0xfe,0x03,0x6f,0x95,0x30,0xf1,0x97,0xfb,0xc0,0x85,0x60,0xd6,0x80,0x25
-    .byte 0xa9,0x63,0xbe,0x03,0x01,0x4e,0x38,0xe2,0xf9,0xa2,0x34,0xff,0xbb,0x3e,0x03,0x44
-    .byte 0x78,0x00,0x90,0xcb,0x88,0x11,0x3a,0x94,0x65,0xc0,0x7c,0x63,0x87,0xf0,0x3c,0xaf
-    .byte 0xd6,0x25,0xe4,0x8b,0x38,0x0a,0xac,0x72,0x21,0xd4,0xf8,0x07
-
-    @ game title
-    .byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
-
-    @ game code
-    .byte 0x00,0x00,0x00,0x00
-
-    @ maker code
-    .byte 0x00,0x00
-
-    .byte 0x96
-
-    @ main unit code
-    .byte 0x00
-
-    @ device type (0x00 retail, 0x80 debug)
-    .byte 0x00
-
-    @ reserved
-    .byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00
-
-    @ software version
-    .byte 0x00
-
-    @ complement check
-    .byte 0x51
-
-    @ reserved area
-    .space 2
+    @ this is replaced with correct header info by `gbafix`
+    .space 188
 
 .Linit:
     @ Set address of user IRQ handler
diff --git a/thumbv4-none-agb.json b/thumbv4-none-agb.json
deleted file mode 100644
index d1de486..0000000
--- a/thumbv4-none-agb.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "abi-blacklist": [
-    "stdcall",
-    "fastcall",
-    "vectorcall",
-    "thiscall",
-    "win64",
-    "sysv64"
-  ],
-  "arch": "arm",
-  "atomic-cas": false,
-  "cpu": "arm7tdmi",
-  "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
-  "emit-debug-gdb-scripts": false,
-  "env": "agb",
-  "executables": true,
-  "features": "+soft-float,+strict-align",
-  "linker": "arm-none-eabi-ld",
-  "linker-flavor": "ld",
-  "linker-is-gnu": true,
-  "llvm-target": "thumbv4-none-agb",
-  "os": "none",
-  "panic-strategy": "abort",
-  "pre-link-args-crt": {
-        "ld": [
-            "crt0.o"
-        ]
-    },
-  "pre-link-args": {
-    "ld": [
-      "-Tlinker.ld"
-    ]
-  },
-  "relocation-model": "static",
-  "target-c-int-width": "32",
-  "target-endian": "little",
-  "target-pointer-width": "32",
-  "vendor": "nintendo"
-}