diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index 4a03e346dc..593de8a8e5 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -15796,6 +15796,7 @@ dependencies = [
  "itertools 0.14.0",
  "jsonwebtoken 8.3.0",
  "lazy_static",
+ "libffi-sys",
  "libloading 0.8.8",
  "mappable-rc",
  "mime_guess",
diff --git a/backend/Cargo.toml b/backend/Cargo.toml
index e7f56b29cc..ac9af8e0e1 100644
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -68,6 +68,7 @@ jemalloc = ["windmill-common/jemalloc", "dep:tikv-jemallocator", "dep:tikv-jemal
 tantivy = ["dep:windmill-indexer", "windmill-api/tantivy", "windmill-indexer/enterprise", "windmill-indexer/parquet", "windmill-common/tantivy", "enterprise", "parquet"]
 sqlx = ["windmill-worker/sqlx"]
 deno_core = ["windmill-worker/deno_core", "windmill-api/deno_core", "dep:deno_core", "dep:v8"]
+deno_core_mac = ["deno_core", "windmill-worker/libffi_mac"]
 kafka = ["windmill-api/kafka"]
 nats = ["windmill-api/nats"]
 otel = ["windmill-common/otel", "windmill-worker/otel"]
@@ -275,6 +276,9 @@ deno_runtime = { version = "0.198.0", features = ["transpile"] }
 deno_telemetry = "0.12.0"
 deno_error = "=0.5.5"
 
+# only used with special deno_core_mac feature to prevent ffi issue on macos, requires libffi to be installed
+libffi-sys = { version = "2.3.0", features = ["system"]}
+
 google-cloud-pubsub = "0.30.0"
 google-cloud-googleapis = {version = "0.16.1", features = ["pubsub"]}
 # TODO: remove once deno fixes the issue on their end
diff --git a/backend/windmill-worker/Cargo.toml b/backend/windmill-worker/Cargo.toml
index 19c8c0d31f..d249a78319 100644
--- a/backend/windmill-worker/Cargo.toml
+++ b/backend/windmill-worker/Cargo.toml
@@ -22,6 +22,7 @@ cloud = []
 sqlx = []
 deno_core = ["dep:deno_fetch", "dep:deno_webidl", "dep:deno_web", "dep:deno_net", "dep:deno_console", "dep:deno_url", "dep:deno_core",
     "dep:deno_ast", "dep:deno_tls", "dep:deno_permissions", "dep:deno_io", "dep:deno_runtime", "dep:deno_telemetry", "dep:deno_error", "dep:winapi"]
+libffi_mac = ["dep:libffi-sys"]
 otel = ["windmill-common/otel", "dep:opentelemetry"]
 dind = ["dep:bollard"]
 php = ["dep:windmill-parser-php"]
@@ -147,3 +148,4 @@ deno_io = { workspace = true, optional = true }
 deno_runtime = { workspace = true, optional = true }
 deno_telemetry = { workspace = true, optional = true }
 winapi = { workspace = true, optional = true }
+libffi-sys = { workspace = true, optional = true }
diff --git a/frontend/README_DEV.md b/frontend/README_DEV.md
index c17ac944c8..c5ba2a0c15 100644
--- a/frontend/README_DEV.md
+++ b/frontend/README_DEV.md
@@ -139,15 +139,6 @@ If you develop wasm parser for new language you can also pass `--wasm-pkg <langu
 
 - To test that you have Rust and Cargo installed run `cargo --version`
 
-**Known issue on M1 Mac while running `cargorun`**
-
-- You may encounter `linking with cc failed` build time error.
-- To solve this run:
-  ```bash
-  echo 'export RUSTFLAGS="-L/opt/homebrew/opt/libomp/lib"' >> ~/.zshrc
-  source ~/.zshrc
-  ```
-
 In the root folder:
 
 ```bash
@@ -166,6 +157,20 @@ In the frontend folder:
 REMOTE=http://127.0.0.1:8000 REMOTE_LSP=http://127.0.0.1:3001 npm run dev
 ```
 
+**Known issue on M1 Mac while running `cargo run`**
+
+- You may encounter `linking with cc failed` build time error.
+- To solve this run:
+  ```bash
+  echo 'export RUSTFLAGS="-L/opt/homebrew/opt/libomp/lib"' >> ~/.zshrc
+  source ~/.zshrc
+  ```
+
+**Known issue on M1 Mac while running `cargo run` with the `deno_core` feature**
+
+- You may encounter ``failed to run custom build command for `libffi-sys v2.3.0` `` build time error.
+- To solve this use the `deno_core_mac` feature flag _instead_ of `deno_core`. You might need to install `libffi` (e.g. `brew install libffi`).
+
 ### Formatting
 
 This project uses [prettier](https://prettier.io/docs/en/install.html) and