diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fc34a4c..e1f24bd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,16 +13,43 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Download Tectonic
-        run:
-          wget "https://github.com/tectonic-typesetting/tectonic/releases/download/tectonic%400.15.0/tectonic-0.15.0-x86_64-unknown-linux-musl.tar.gz" &&
-          tar -xf "tectonic-0.15.0-x86_64-unknown-linux-musl.tar.gz"
+      # Could instead install `texlive-full`, but that takes ~20 minutes.
+      # We'll specify the packages we need manually.
+      - name: "Install TeXLive"
+        run: |
+          sudo apt update
+          DEBIAN_FRONTEND=noninteractive \
+            sudo apt install --yes \
+            texlive texlive-xetex \
+            texlive-games texlive-fonts-extra texlive-latex-extra \
+            texlive-pictures texlive-pstricks
 
-      - name: Build LaTeX handouts
-        run: bash build.sh
+      - name: "Download Typst"
+        run: |
+          wget -q "https://github.com/typst/typst/releases/download/v0.12.0/typst-x86_64-unknown-linux-musl.tar.xz"
+          tar -xf "typst-x86_64-unknown-linux-musl.tar.xz"
+          mv "typst-x86_64-unknown-linux-musl/typst" .
+          rm "typst-x86_64-unknown-linux-musl.tar.xz"
+          rm -dr "typst-x86_64-unknown-linux-musl"
 
-      - uses: actions/upload-artifact@v3
+      # Builds all handouts, LaTeX and Typst
+      - name: "Build handouts"
+        run: TYPST_PATH="$(pwd)/typst" python tools/build/main.py
+
+      # Upload logs, even if build fails.
+      # LaTeX stdout/stderr isn't always helpful.
+      - name: "Save LaTeX logs"
+        uses: actions/upload-artifact@v3
+        if: always()
         with:
-          name: output
+          name: "LaTeX logs"
+          path: "**/*.log"
+          retention-days: 1
+
+      # Upload build output
+      - name: "Save output"
+        uses: actions/upload-artifact@v3
+        with:
+          name: "Build output"
           path: "output/*"
           retention-days: 10
diff --git a/Warm-Ups/What's an AST?/main.tex b/Warm-Ups/What's an AST/main.tex
similarity index 100%
rename from Warm-Ups/What's an AST?/main.tex
rename to Warm-Ups/What's an AST/main.tex
diff --git a/Warm-Ups/What's an AST?/meta.toml b/Warm-Ups/What's an AST/meta.toml
similarity index 100%
rename from Warm-Ups/What's an AST?/meta.toml
rename to Warm-Ups/What's an AST/meta.toml
diff --git a/tools/build/main.py b/tools/build/main.py
index 2bd7257..0d7aa47 100644
--- a/tools/build/main.py
+++ b/tools/build/main.py
@@ -16,10 +16,15 @@ ROOT: Path = Path(os.getcwd())
 
 ### CONFIGURATION
 OUT_DIR: Path = ROOT / "output"
-TYPST_PATH = "typst"
-XETEX_PATH = "xelatex"
+TYPST_PATH: str = "typst"
+XETEX_PATH: str = "xelatex"
 ### END CONFIGURATION
 
+# Allow path override
+_env = os.environ.get("TYPST_PATH")
+if isinstance(_env, str):
+	TYPST_PATH = _env
+
 
 def log(msg):
 	print(f"[BUILD.PY] {msg}")
@@ -49,6 +54,10 @@ MetaToml = TypedDict(
 )
 
 
+def sanitize_file_name(file: str) -> str:
+	return file.replace("?", "")
+
+
 def read_meta_toml(file: Path) -> MetaToml:
 	with file.open("rb") as f:
 		base = tomllib.load(f)
@@ -127,6 +136,7 @@ def build_typst(source_dir: Path, out_subdir: Path) -> IndexEntry | None:
 	out = OUT_DIR / out_subdir
 	out.mkdir(parents=True, exist_ok=True)
 
+	file_name = sanitize_file_name(f"{meta['title']}.pdf")
 	res = subprocess.run(
 		[
 			TYPST_PATH,
@@ -135,7 +145,7 @@ def build_typst(source_dir: Path, out_subdir: Path) -> IndexEntry | None:
 			"main.typ",
 			"--input",
 			"show_solutions=false",
-			f"{out}/{meta['title']}.pdf",
+			f"{out}/{file_name}",
 		],
 		cwd=source_dir,
 		stdout=subprocess.PIPE,
@@ -148,13 +158,14 @@ def build_typst(source_dir: Path, out_subdir: Path) -> IndexEntry | None:
 	# Build solutions
 	if meta["publish_solutions"]:
 		log(f"Building typst (solutions): {source_dir}")
+		file_name = sanitize_file_name(f"{meta['title']}.sols.pdf")
 		res = subprocess.run(
 			[
 				TYPST_PATH,
 				"compile",
 				"--ignore-system-fonts",
 				"main.typ",
-				f"{out}/{meta['title']}.sols.pdf",
+				f"{out}/{file_name}",
 			],
 			cwd=source_dir,
 			stdout=subprocess.PIPE,
@@ -208,7 +219,12 @@ def build_xetex(source_dir: Path, out_subdir: Path) -> IndexEntry | None:
 		stderr=subprocess.PIPE,
 	)
 
-	shutil.copy(source_dir / "main.pdf", f"{out}/{meta['title']}.pdf")
+	file_name = sanitize_file_name(f"{meta['title']}.pdf")
+	try:
+		shutil.copy(source_dir / "main.pdf", f"{out}/{file_name}")
+	except Exception as e:
+		log(f"Error: {e}")
+		log_error(res)
 
 	if res.returncode != 0:
 		log_error(res)
@@ -227,7 +243,12 @@ def build_xetex(source_dir: Path, out_subdir: Path) -> IndexEntry | None:
 			stderr=subprocess.PIPE,
 		)
 
-		shutil.copy(source_dir / "main.pdf", f"{out}/{meta['title']}.sols.pdf")
+		file_name = sanitize_file_name(f"{meta['title']}.sols.pdf")
+		try:
+			shutil.copy(source_dir / "main.pdf", f"{out}/{file_name}")
+		except Exception as e:
+			log(f"Error: {e}")
+			log_error(res)
 
 		if res.returncode != 0:
 			log_error(res)
@@ -278,6 +299,7 @@ def build_dir(base: str, out_sub: str, index: list[IndexEntry]):
 
 index: list[IndexEntry] = []
 
+index.extend(build_dir("Warm-Ups", "Warm-Ups", index))
 index.extend(build_dir("Advanced", "Advanced", index))
 index.extend(build_dir("Intermediate", "Intermediate", index))