diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000000..5166a810c5
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,16 @@
+# shellcheck shell=bash
+if ! has nix_direnv_version || ! nix_direnv_version 3.0.4; then
+  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/3.0.4/direnvrc" "sha256-DzlYZ33mWF/Gs8DDeyjr8mnVmQGx7ASYqA5WlxwvBG4="
+fi
+
+dotenv_if_exists
+
+# watch_file "$(find ./nix -name "*.nix" -type f)"
+
+OS_AND_SYSTEM=$(uname -a)
+
+if [[ "${NO_NIX:-}" == "1" || $OS_AND_SYSTEM == "Darwin"* ]]; then
+  source non-nix-build/env.sh
+else
+  use flake
+fi
diff --git a/.gitignore b/.gitignore
index 08f2b95e18..877f83c211 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,6 @@ spec/target
 **/fuzz/artifacts/
 **/fuzz/crash-inputs/
 **/fuzz/Cargo.lock
+
+*.wasm
+.direnv/
diff --git a/Cargo.lock b/Cargo.lock
index 9cbd7de74f..87a4fe31bd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1712,10 +1712,6 @@ dependencies = [
  "wasm-encoder 0.227.1",
 ]
 
-[[package]]
-name = "wasm-test"
-version = "0.44.0"
-
 [[package]]
 name = "wasmi"
 version = "0.31.2"
diff --git a/Cargo.toml b/Cargo.toml
index d5a4319355..f40f5442e7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,8 @@ members = [
     "crates/ir",
     "crates/fuzz",
     "crates/wast",
-    "fuzz", "wasm-test", "crates/tracer",
+    "fuzz", "crates/tracer",
+    # "wasm-test",
 ]
 exclude = []
 resolver = "2"
diff --git a/justfile b/justfile
new file mode 100644
index 0000000000..d2287c40f2
--- /dev/null
+++ b/justfile
@@ -0,0 +1,10 @@
+build-wasm-test-c:
+  emcc -O0 -g3 -o wasm_test.wasm wasm_test.c
+
+dwarfdump wasm-path:
+  # from llvm
+  llvm-dwarfdump {{wasm-path}}
+
+dis wasm-path:
+  # from binaryen
+  wasm-dis {{wasm-path}}
diff --git a/shell.nix b/shell.nix
index 96f0a8ac44..d145d35563 100644
--- a/shell.nix
+++ b/shell.nix
@@ -26,7 +26,15 @@ mkShell {
     emscripten
     binaryen
     llvm
+    just
     rust-analyzer
+
+    figlet
   ];
 
+  shellHook = ''
+    export EM_CACHE=/tmp/emcc/
+
+    figlet "welcome to wasmi recorder"
+  '';
 }
diff --git a/wasm_test.c b/wasm_test.c
new file mode 100644
index 0000000000..f9cb952d43
--- /dev/null
+++ b/wasm_test.c
@@ -0,0 +1,4 @@
+int main() {
+    int x = 1;
+    int y = 2;
+}