feat: symlink all deps using symlinkJoin

default.nix

@@ -1,34 +1,21 @@
-{ pkgs, lib, ... }:
+{ pkgs, ... }:
 let
   wasm-llvm = import ./wasm-llvm.nix { inherit pkgs; };
   wasm-libcxx = import ./wasm-libcxx.nix { inherit pkgs; };
   wasi-libc = import ./wasi-libc.nix { inherit pkgs; };
   wasm-compiler-rt = import ./wasm-compiler-rt.nix { inherit pkgs; };
-
-  paths = {
-    WASM_LLVM = wasm-llvm;
-    WASM_LIBCXX_LIB = "${wasm-libcxx}/lib";
-    WASM_LIBCXX_INC = "${wasm-libcxx}/include/c++/v1";
-    WASM_COMPILER_RT_LIB = "${wasm-compiler-rt}/lib/wasi";
-    WASI_LIBC_LIB = "${wasi-libc}/lib";
-    WASI_LIBC_INC = "${wasi-libc.dev}/include";
-  };
-
-  pathsFileContents = lib.strings.concatLines (
-    lib.attrsets.mapAttrsToList (name: value: name + "=" + value) paths
-  );
 in
-pkgs.stdenv.mkDerivation rec {
+pkgs.symlinkJoin {
   name = "wasm-sdk";
   version = "1.0.0";
 
+  paths = [
+    wasm-llvm
+    wasm-libcxx
+    wasi-libc
+    wasi-libc.dev
+    wasm-compiler-rt
+  ];
+
   dontUnpack = true;
-
-  installPhase = ''
-    echo "${pathsFileContents}" > $out
-  '';
-
-  passthru = {
-    inherit paths;
-  };
 }