diff --git a/core/build.rs b/core/build.rs
new file mode 100644
index 00000000..dd361085
--- /dev/null
+++ b/core/build.rs
@@ -0,0 +1,16 @@
+fn main() {
+	if cfg!(target_arch = "wasm32") {
+		println!("cargo:rustc-cfg=wasm");
+		println!("cargo::rustc-check-cfg=cfg(wasm)");
+	}
+	if cfg!(any(
+		feature = "kv-mem",
+		feature = "kv-fdb",
+		feature = "kv-tikv",
+		feature = "kv-rocksdb",
+		feature = "kv-surrealkv",
+	)) {
+		println!("cargo:rustc-cfg=storage");
+		println!("cargo::rustc-check-cfg=cfg(storage)");
+	}
+}
diff --git a/lib/build.rs b/lib/build.rs
new file mode 100644
index 00000000..dd361085
--- /dev/null
+++ b/lib/build.rs
@@ -0,0 +1,16 @@
+fn main() {
+	if cfg!(target_arch = "wasm32") {
+		println!("cargo:rustc-cfg=wasm");
+		println!("cargo::rustc-check-cfg=cfg(wasm)");
+	}
+	if cfg!(any(
+		feature = "kv-mem",
+		feature = "kv-fdb",
+		feature = "kv-tikv",
+		feature = "kv-rocksdb",
+		feature = "kv-surrealkv",
+	)) {
+		println!("cargo:rustc-cfg=storage");
+		println!("cargo::rustc-check-cfg=cfg(storage)");
+	}
+}