diff --git a/.github/workflows/gen_matrix.py b/.github/workflows/gen_matrix.py
index 868eb5d..09af618 100644
--- a/.github/workflows/gen_matrix.py
+++ b/.github/workflows/gen_matrix.py
@@ -3,17 +3,21 @@
 from pathlib import Path
 
 includes: list[dict[str, str]] = []
+
+
+def add_config(**kwargs: str) -> None:
+    includes.append({"compiler": "g++", **kwargs})
+    includes.append({"compiler": "clang++", **kwargs})
+
+
 changed_files = json.loads(sys.argv[1])
 for file in changed_files:
     path = Path(file)
     print(path, file=sys.stderr)
 
-includes.append({"dir": "2023", "target": "day01"})
-includes.append({"dir": "2023", "target": "day02"})
-includes.append({"dir": "2023", "target": "day03"})
-includes.append({"dir": "2022", "target": "day19"})
+add_config(dir="2023", target="day01")
+add_config(dir="2023", target="day02")
+add_config(dir="2023", target="day03")
+add_config(dir="2022", target="day19")
 
-matrix = {
-    # "compiler": ["clang++", "g++"],
-}
-print("matrix-combinations=" + json.dumps({**matrix, "include": includes}))
+print("matrix-combinations=" + json.dumps({"include": includes}))