diff --git a/crates/lb/src/task.lua b/crates/lb/src/task.lua
new file mode 100644
index 0000000..9969a72
--- /dev/null
+++ b/crates/lb/src/task.lua
@@ -0,0 +1,6 @@
+local task = require("lb:task")
+
+-- include `lb_tasklib::spawn` in the global scope
+function spawn(f, ...)
+  return task:spawn(f, ...)
+end
diff --git a/crates/lb/src/task.rs b/crates/lb/src/task.rs
index 022d493..c7f1134 100644
--- a/crates/lb/src/task.rs
+++ b/crates/lb/src/task.rs
@@ -7,6 +7,7 @@ use tokio::task::JoinHandle;
 pub struct lb_tasklib;
 
 #[metatype]
+#[include("task.lua")]
 impl lb_tasklib {
     #[new]
     extern "Lua-C" fn new() -> Self {
diff --git a/crates/luaffi_impl/src/metatype.rs b/crates/luaffi_impl/src/metatype.rs
index 901a7d4..b63425b 100644
--- a/crates/luaffi_impl/src/metatype.rs
+++ b/crates/luaffi_impl/src/metatype.rs
@@ -62,12 +62,12 @@ fn generate_impls(_args: &Args, imp: &mut ItemImpl) -> Result<TokenStream> {
     imp.attrs.retain(|attr| {
         if attr.path().is_ident("include") {
             if let Ok(path) = attr.parse_args::<LitStr>() {
-                registry.build.push(quote_spanned!(attr.span() =>
+                registry.build.push(quote_spanned!(path.span() =>
                     b.include_lua(::std::include_str!(#path));
                 ));
                 return false;
             } else if let Ok(chunk) = attr.parse_args::<Block>() {
-                registry.build.push(quote_spanned!(attr.span() =>
+                registry.build.push(quote_spanned!(chunk.span() =>
                     b.include_lua(#ffi::__internal::luaify_chunk!(#chunk));
                 ));
                 return false;