cargo build -> cargo check

ci/script.sh

@@ -2,11 +2,11 @@ set -ex
 
 main() {
     if [ $TARGET = x86_64-unknown-linux-gnu ]; then
-        cargo build --target $TARGET
+        cargo check --target $TARGET
         return
     fi
 
-    xargo build --target $TARGET
+    xargo check --target $TARGET
     xargo test --target $TARGET --examples
 }