diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 01319abf..61c2f182 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -25,3 +25,9 @@ jobs:
       working-directory: ./build
     - name: Build
       run: ninja -C build
+    - uses: actions/upload-artifact@v2
+      with:
+        name: build
+        path: |
+          build/uking
+          data/uking_functions.csv
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
new file mode 100644
index 00000000..d6729aff
--- /dev/null
+++ b/.github/workflows/check.yml
@@ -0,0 +1,27 @@
+name: check
+on:
+  workflow_run:
+    workflows: ["build"]
+    types:
+      - completed
+jobs:
+  check-matchings:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: haya14busa/action-workflow_run-status@967ed83efa565c257675ed70cfe5231f062ddd94
+    - uses: actions/checkout@v2
+    - run: git submodule update --init --recursive
+    - name: Install pip
+      run: sudo apt update && sudo apt install -y python3-pip
+    - name: Install tool dependencies
+      run: sudo python3 -m pip install capstone colorama cxxfilt pyelftools gpg wget
+    - name: Download executable
+      run: wget https://static.zeldamods.org/botw/16A91992BBA71201E98756F3BC8F5D2F.elf.gpg
+    - name: Decrypt executable
+      run: gpg --quiet --batch --yes --decrypt --passphrase="${{ secrets.leo_secret }}" --output data/main.elf 16A91992BBA71201E98756F3BC8F5D2F.elf.gpg
+    - name: Download artifacts
+      uses: dawidd6/action-download-artifact@3cd20b2b63293848b29e22223f515baf725ed98f
+      with:
+        workflow: build.yml
+    - name: Check matchings
+      run: tools/check.py
diff --git a/tools/check.py b/tools/check.py
index 15648727..9732dcf9 100755
--- a/tools/check.py
+++ b/tools/check.py
@@ -4,6 +4,7 @@ import capstone as cs
 from elftools.elf.elffile import ELFFile
 import diff_settings
 from pathlib import Path
+import sys
 from typing import Any, Dict, Set
 import utils
 
@@ -49,7 +50,7 @@ def check_function(addr: int, size: int, name: str) -> bool:
     try:
         base_fn = get_fn_from_base_elf(addr, size)
     except KeyError:
-        utils.fail(f"couldn't find base function 0x{addr:016x} for {name}")
+        utils.print_error(f"couldn't find base function 0x{addr:016x} for {name}")
         return False
 
     try:
@@ -127,14 +128,18 @@ def check_function(addr: int, size: int, name: str) -> bool:
 
 
 def main() -> None:
+    failed = False
     for func in utils.get_functions():
         if not func.decomp_name:
             continue
 
         if func.status == utils.FunctionStatus.Matching:
             if not check_function(func.addr, func.size, func.decomp_name):
-                utils.fail(f"{func.decomp_name} was marked as matching but does not match")
-                return
+                utils.print_error(f"{func.decomp_name} was marked as matching but does not match")
+                failed = True
+
+    if failed:
+        sys.exit(1)
 
 
 if __name__ == "__main__":
diff --git a/tools/utils.py b/tools/utils.py
index a6463d2c..ab544aab 100644
--- a/tools/utils.py
+++ b/tools/utils.py
@@ -68,6 +68,10 @@ def warn(msg: str):
     sys.stderr.write(f"{Fore.MAGENTA}{Style.BRIGHT}warning:{Fore.RESET} {msg}{Style.RESET_ALL}\n")
 
 
-def fail(msg: str):
+def print_error(msg: str):
     sys.stderr.write(f"{Fore.RED}{Style.BRIGHT}error:{Fore.RESET} {msg}{Style.RESET_ALL}\n")
+
+
+def fail(msg: str):
+    print_error(msg)
     sys.exit(1)