diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index fc245ce..3489c09 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -20,6 +20,9 @@ jobs:
     - name: Vendor
       run: ./scripts/vendor.sh
 
+    - name: Prepare
+      run: apt-get update && apt-get install protobuf-compiler
+
     - name: Build
       run: RUST_BACKTRACE=full cargo build
 
diff --git a/protokit_build/src/lib.rs b/protokit_build/src/lib.rs
index 147ee4d..e93b41a 100644
--- a/protokit_build/src/lib.rs
+++ b/protokit_build/src/lib.rs
@@ -72,7 +72,7 @@ impl ProtocContext {
         }
 
         cmd.arg(format!("-o{}/descriptor.bin", std::env::var("OUT_DIR").unwrap()));
-        let out = cmd.output().unwrap();
+        let out = cmd.output().expect("PROTOC invocation failed");
         if !out.status.success() {
             bail!("Protoc error: {}", String::from_utf8_lossy(&out.stderr))
         }