diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..17b73c8
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,4 @@
+[build]
+# when using osx, we need to link against some golang libraries, it did just work with this missing flags
+# from: https://github.com/golang/go/issues/42459
+rustflags = ["-C", "link-args=-framework CoreFoundation -framework Security"]
\ No newline at end of file
diff --git a/waku-sys/build.rs b/waku-sys/build.rs
index 955f6c4..5983533 100644
--- a/waku-sys/build.rs
+++ b/waku-sys/build.rs
@@ -1,5 +1,3 @@
-extern crate core;
-
 use std::env;
 use std::env::set_current_dir;
 use std::path::PathBuf;