diff --git a/wasm/bench/cmd/barebones/main.go b/wasm/bench/cmd/barebones/main.go
index 06ab7d0f9..584d6fb8d 100644
--- a/wasm/bench/cmd/barebones/main.go
+++ b/wasm/bench/cmd/barebones/main.go
@@ -1 +1,81 @@
 package main
+
+import (
+	"context"
+	"fmt"
+	"github.com/tetratelabs/wazero/api"
+	"log"
+	"os"
+
+	"github.com/tetratelabs/wazero"
+	"github.com/tetratelabs/wazero/imports/wasi_snapshot_preview1"
+	"github.com/tetratelabs/wazero/sys"
+)
+
+// main writes an input file to stdout, just like `cat`.
+//
+// This is a basic introduction to the WebAssembly System Interface (WASI).
+// See https://github.com/WebAssembly/WASI
+func main() {
+	// Choose the context to use for function calls.
+	ctx := context.Background()
+
+	// Create a new WebAssembly Runtime.
+	runtime := wazero.NewRuntime(ctx)
+	defer runtime.Close(ctx) // This closes everything this Runtime created.
+
+	reader, err := os.Open("/Users/colindickson/code/dfuse/substreams/wasm/bench/cmd/barebones/testdata/block.binpb")
+	if err != nil {
+		panic(err)
+	}
+	defer reader.Close()
+
+	// Combine the above into our baseline config, overriding defaults.
+	config := wazero.NewModuleConfig().
+		// By default, I/O streams are discarded and there's no file system.
+		WithStdout(os.Stdout).WithStderr(os.Stderr).WithStdin(reader)
+	config = config.WithStartFunctions("popo")
+
+	// Instantiate WASI, which implements system I/O such as console output.
+	wasi_snapshot_preview1.MustInstantiate(ctx, runtime)
+
+	build := runtime.NewHostModuleBuilder("env")
+	build.NewFunctionBuilder().
+		WithGoModuleFunction(api.GoModuleFunc(func(ctx context.Context, mod api.Module, stack []uint64) {
+			fmt.Println("hello world")
+		}), nil, nil).
+		WithName("bar").
+		Export("bar")
+	patateModule, err := build.Compile(ctx)
+	if err != nil {
+		panic(err)
+	}
+	apiMod, err := runtime.InstantiateModule(ctx, patateModule, config.WithName("env"))
+	if err != nil {
+		panic(err)
+	}
+	_ = apiMod
+
+	catWasm := readCode("/Users/colindickson/code/dfuse/substreams/wasm/bench/substreams_ts/index.wasm")
+
+	// InstantiateModule runs the "_start" function, WASI's "main".
+	// * Set the program name (arg[0]) to "wasi"; arg[1] should be "/test.txt".
+	if _, err := runtime.InstantiateWithConfig(ctx, catWasm, config); err != nil {
+		// Note: Most compilers do not exit the module after running "_start",
+		// unless there was an error. This allows you to call exported functions.
+		if exitErr, ok := err.(*sys.ExitError); ok && exitErr.ExitCode() != 0 {
+			fmt.Fprintf(os.Stderr, "exit_code: %d\n", exitErr.ExitCode())
+		} else if !ok {
+			log.Panicln(err)
+		}
+	}
+}
+
+func readCode(filename string) []byte {
+	content, err := os.ReadFile(filename)
+	if err != nil {
+		panic(err)
+	}
+
+	return content
+}
diff --git a/wasm/bench/substreams_ts/env.js b/wasm/bench/substreams_ts/env.js
new file mode 100644
index 000000000..e69de29bb
diff --git a/wasm/bench/substreams_ts/env.ts b/wasm/bench/substreams_ts/env.ts
index 190586946..df2a4070b 100644
--- a/wasm/bench/substreams_ts/env.ts
+++ b/wasm/bench/substreams_ts/env.ts
@@ -1 +1,3 @@
-export declare function bar(): void
\ No newline at end of file
+declare module "Env" {
+    export function bar(): void
+}
diff --git a/wasm/bench/substreams_ts/index.js b/wasm/bench/substreams_ts/index.js
index e1557e60f..6d3d5bad1 100644
--- a/wasm/bench/substreams_ts/index.js
+++ b/wasm/bench/substreams_ts/index.js
@@ -754,6 +754,13 @@ var require_bigInt = __commonJS({
   }
 });
 
+// env.ts
+var require_env = __commonJS({
+  "env.ts"() {
+    "use strict";
+  }
+});
+
 // index.ts
 var import_bigInt = __toESM(require_bigInt());
 
@@ -5228,6 +5235,7 @@ _Field.fields = proto3.util.newFieldList(() => [
 var Field = _Field;
 
 // index.ts
+var Env = __toESM(require_env());
 var rocketAddress = bytesFromHex("0xae78736Cd615f374D3085123A210448E74Fc6393");
 var approvalTopic = bytesFromHex(
   "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925"
@@ -5237,6 +5245,7 @@ var transferTopic = bytesFromHex(
 );
 function popo() {
   console.log("Hello from popo!");
+  (void 0)();
   const out = map_block(readInput());
   writeOutput(out);
 }
diff --git a/wasm/bench/substreams_ts/index.ts b/wasm/bench/substreams_ts/index.ts
index b81f1a3bd..4b3453938 100644
--- a/wasm/bench/substreams_ts/index.ts
+++ b/wasm/bench/substreams_ts/index.ts
@@ -17,10 +17,12 @@ const transferTopic = bytesFromHex(
 )
 
 // @ts-ignore
+import * as Env from "./env";
 
 export function popo() {
   console.log("Hello from popo!")
 
+  Env.bar()
 
   const out = map_block(readInput())
   writeOutput(out)
diff --git a/wasm/bench/substreams_ts/index.wasm b/wasm/bench/substreams_ts/index.wasm
index 1ec4fa301..bd59fde5e 100644
Binary files a/wasm/bench/substreams_ts/index.wasm and b/wasm/bench/substreams_ts/index.wasm differ
diff --git a/wasm/bench/substreams_ts/package.json b/wasm/bench/substreams_ts/package.json
index ddfdb67fe..d1ef44897 100644
--- a/wasm/bench/substreams_ts/package.json
+++ b/wasm/bench/substreams_ts/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "",
   "scripts": {
-    "build": "esbuild --bundle index.ts --format=esm --outdir=. --target=es2020 && javy compile index.js --wit index.wit -n index-world -o ./index.wasm"
+    "build": "esbuild --bundle env.ts index.ts --format=esm --outdir=. --target=es2020 && javy compile index.js --wit index.wit -n index-world -o ./index.wasm"
   },
   "repository": {
     "type": "git",
diff --git a/wasm/bench/substreams_wasi/wasi_hello_world/hello.wasm b/wasm/bench/substreams_wasi/wasi_hello_world/hello.wasm
index f97f2613f..eaafa5234 100755
Binary files a/wasm/bench/substreams_wasi/wasi_hello_world/hello.wasm and b/wasm/bench/substreams_wasi/wasi_hello_world/hello.wasm differ
diff --git a/wasm/bench/substreams_wasi/wasi_hello_world/src/main.rs b/wasm/bench/substreams_wasi/wasi_hello_world/src/main.rs
index 8c36cd7e4..c2f888b9e 100644
--- a/wasm/bench/substreams_wasi/wasi_hello_world/src/main.rs
+++ b/wasm/bench/substreams_wasi/wasi_hello_world/src/main.rs
@@ -25,6 +25,10 @@ fn main() {
 #[no_mangle]
 pub extern "C" fn map_block(blk_ptr: *mut u8, blk_len: usize) {
     println!("Hello world! {}", blk_len);
+
+    // let mut file = fs::File::create("/helloworld/helloworld.txt").unwrap();
+    // write!(file, "Hello world!\n").unwrap();
+
     let mut buf = Vec::with_capacity(50000);
     let ptr = buf.as_mut_ptr();
     unsafe {
diff --git a/wasm/wazero/module.go b/wasm/wazero/module.go
index 998bd9451..1981982c4 100644
--- a/wasm/wazero/module.go
+++ b/wasm/wazero/module.go
@@ -78,8 +78,10 @@ func newModule(ctx context.Context, wasmCode []byte, wasmCodeType string, regist
 	//	return nil, fmt.Errorf("missing required functions: dealloc")
 	//}
 
+	wazConfig := wazero.NewModuleConfig()
+
 	return &Module{
-		wazModuleConfig: wazero.NewModuleConfig(),
+		wazModuleConfig: wazConfig,
 		wazRuntime:      runtime,
 		userModule:      mod,
 		hostModules:     hostModules,