diff --git a/.gitignore b/.gitignore
index b98403ec..8e8b5547 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 build/
 /out
 /lib/nnsdk
+toolchain/nx-*
+toolchain/musl
diff --git a/README.md b/README.md
index fd44ec71..37098b00 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,9 @@ Usage of the materials here outside of matching decompilation is not supported.
 
 # Development
 For running commands please install [task](https://taskfile.dev), CMake, Ninja and Clang/LLVM.
-The Clang/LLVM toolchain version should match the [image used in the PR](https://github.com/open-ead/containers/blob/main/ubuntu-builder/Dockerfile)
+
+The Clang/LLVM toolchain is only used for formatting and running `clang-tidy`.
+The version should match the [image used in the PR](https://github.com/open-ead/containers/blob/main/ubuntu-builder/Dockerfile)
 
 Before you begin, run `task clone-deps` to clone dependencies.
 
diff --git a/Taskfile.yml b/Taskfile.yml
index 74c15d3c..87d93710 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -3,6 +3,7 @@ version: '3'
 # https://taskfile.dev
 
 vars:
+  NX_AARCH64: 22.1.8-1
   # Modules to check with clang-format/clang-tidy;
   MODULES: atk,font,g3d,ui2d,vfx
   _MODULES1: ',{{.MODULES}}'
@@ -10,6 +11,9 @@ vars:
   SOURCES: '{{._MODULES1 | replace "," " lib/"}}'
   CLANG_TIDY_LIBS: '{{.MODULES | replace " " "" | replace "," "|" }}'
 
+env:
+  NX_AARCH64: '{{.NX_AARCH64}}'
+
 tasks:
   clone-deps:
     desc: Clone dependencies for development
@@ -27,35 +31,17 @@ tasks:
   configure:
     desc: Configure CMake
     cmds:
-      - task: cmake
-        vars:
-          CMAKE_ARGS: -DNNSDK_DIR=$(pwd)/lib/nnsdk
-      - >
-        cmake -G Ninja -B test/header_check/build -S test/header_check
-        -DNN_SDK=1.2.3 
-        -DNN_WARE=4.5.6 
-        -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
-        -DCMAKE_CXX_STANDARD=17
-        -DCMAKE_C_COMPILER=clang
-        -DCMAKE_CXX_COMPILER=clang++
-        -DCMAKE_C_FLAGS='-D__aarch64__'
-        -DCMAKE_CXX_FLAGS='-D__aarch64__'
-        -DNNSDK_DIR=$(pwd)/lib/nnsdk
-  cmake:
-    cmds:
-      - >
-        cmake -G Ninja -B build -S .
-        -DNN_SDK=1.2.3 
-        -DNN_WARE=4.5.6 
-        -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
-        -DCMAKE_CXX_STANDARD=17
-        -DCMAKE_C_COMPILER=clang
-        -DCMAKE_CXX_COMPILER=clang++
-        -DCMAKE_C_FLAGS='-D__aarch64__'
-        -DCMAKE_CXX_FLAGS='-D__aarch64__'
-        {{.CMAKE_ARGS}}
-        {{.CLI_ARGS}}
-      
+      - silent: true
+        cmd: |
+          if [ -z "$CI" ]; then
+            [ -d "toolchain/musl" ] || git clone https://github.com/open-ead/botw-lib-musl toolchain/musl
+            VERSION={{.NX_AARCH64}}
+            OUTPUT=toolchain
+            [ -d "$OUTPUT/nx-aarch64-$VERSION" ] || curl -fsSL https://raw.githubusercontent.com/Pistonight/nx-aarch64/main/install.sh | VERSION="$VERSION" OUTPUT="$OUTPUT" sh
+          fi
+      - cmake -G Ninja -DCMAKE_TOOLCHAIN_FILE="$PWD/toolchain/Toolchain.cmake" -B build
+      - cmake -G Ninja -DCMAKE_TOOLCHAIN_FILE="$PWD/toolchain/Toolchain.cmake" -B test/header_check/build -S test/header_check
+
 
   build:
     desc: Check the project builds
diff --git a/toolchain/Toolchain.cmake b/toolchain/Toolchain.cmake
new file mode 100644
index 00000000..78735c1f
--- /dev/null
+++ b/toolchain/Toolchain.cmake
@@ -0,0 +1,75 @@
+# Toolchain file used to do verification build tests. Adopted from BOTW
+
+if (DEFINED ENV{NNSDK_DIR})
+    message(STATUS "Using NNSDK_DIR: $ENV{NNSDK_DIR}")
+    set(NNSDK_DIR "$ENV{NNSDK_DIR}")
+else()
+    set(NNSDK_DIR "${CMAKE_CURRENT_LIST_DIR}/../lib/nnsdk")
+endif()
+if (DEFINED ENV{NX_CLANG})
+    message(STATUS "Using NX_CLANG: $ENV{NX_CLANG}")
+    set(NX_CLANG "$ENV{NX_CLANG}")
+else()
+    if (NOT DEFINED ENV{NX_AARCH64})
+        message(FATAL_ERROR "please define NX_CLANG or NX_AARCH64")
+    endif()
+    message(STATUS "Using NX_AARCH64: $ENV{NX_AARCH64}")
+    set(NX_CLANG "${CMAKE_CURRENT_LIST_DIR}/nx-aarch64-$ENV{NX_AARCH64}")
+endif()
+if (DEFINED ENV{NX_MUSL})
+    message(STATUS "Using NX_MUSL: $ENV{NX_MUSL}")
+    set(NX_MUSL "$ENV{NX_MUSL}")
+else()
+    set(NX_MUSL "${CMAKE_CURRENT_LIST_DIR}/musl")
+endif()
+
+
+# no need for optimization or debug info for testing
+# set(NX64_OPT_FLAGS "-O3 -g")
+set(NX64_TRIPLE aarch64-linux-elf)
+
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_VERSION 1)
+set(CMAKE_SYSTEM_PROCESSOR aarch64)
+
+set(CMAKE_SYSROOT ${NX_MUSL})
+set(CMAKE_C_COMPILER "${NX_CLANG}/bin/clang")
+set(CMAKE_C_COMPILER_TARGET ${NX64_TRIPLE})
+set(CMAKE_CXX_COMPILER "${NX_CLANG}/bin/clang++")
+set(CMAKE_CXX_COMPILER_TARGET ${NX64_TRIPLE})
+
+set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+# Target options
+add_compile_options(-mcpu=cortex-a57+fp+simd+crypto+crc)
+add_compile_options(-mno-implicit-float)
+# Environment
+add_compile_options(-stdlib=libc++)
+add_compile_options(-fPIC)
+# Helps with matching as this causes Clang to emit debug type info even for dynamic classes
+# with undefined vtables.
+add_compile_options(-fstandalone-debug)
+
+add_definitions(-D SWITCH)
+add_definitions(-D NNSDK)
+add_definitions(-D MATCHING_HACK_NX_CLANG)
+
+add_link_options(
+  # Use lld for performance reasons (and because we don't want a dependency on GNU tools)
+  -fuse-ld=lld
+  # We are not linking executables so these aren't needed
+  # (technically we are not linking at all but CMake will always ensure linking is possible)
+  -nostartfiles -nodefaultlibs
+)
+
+# TODO: Currently, we only build for a stub versions
+# this means we might not catch errors that only happen
+# in one of the versions. This is partially mitigated
+# by building SMO and BOTW in CI
+set(NN_SDK 1.2.3)
+set(NN_WARE 4.5.6)