diff --git a/README.md b/README.md
index b7f276b..402d389 100644
--- a/README.md
+++ b/README.md
@@ -1,18 +1,6 @@
 # wasm-sdk
 
-A SDK for LLVM C and C++ WebAssembly development based on Nix.
-
-It builds all required dependencies (*clang, clang++, wasm-ld, libcxx, compiler-rt*, and *wasi-libc*)
-and exposes the following environment variables needed to compile to WebAssembly, for example:
-
-```
-WASM_LLVM=/nix/store/akpcpb9ycb98jjbp6dyg1j65vkwqp1lm-wasm-llvm
-WASM_LIBCXX_LIB=/nix/store/ll4hi2jkhv8399dhbz6q0qgw97c6hyja-wasm-libcxx/lib
-WASM_LIBCXX_INC=/nix/store/ll4hi2jkhv8399dhbz6q0qgw97c6hyja-wasm-libcxx/include/c++/v1
-WASM_COMPILER_RT_LIB=/nix/store/59lmk928vly8126zq7mabzc9123hknj2-wasm-compiler-rt/lib/wasi
-WASI_LIBC_LIB=/nix/store/qislis4ivwv3l721dbhghax6j4kp3ccb-wasi-libc/lib
-WASI_LIBC_INC=/nix/store/71k5vk20275571n0bsij42qdasbxc82b-wasi-libc-dev/include
-```
+A *Nix*-based SDK for C and C++ development targeting WebAssembly.
 
 ## Goals
 
@@ -28,16 +16,10 @@ WASI_LIBC_INC=/nix/store/71k5vk20275571n0bsij42qdasbxc82b-wasi-libc-dev/include
 
 ## Usage
 
-The included derivation produces a single file with exportable environment variables.
+The package contains all required dependencies in the following build subdirectories:
 
-Example:
-
-```sh
-env $(cat $(nix-build -E 'with import <nixpkgs> {}; callPackage ./default.nix {}')) printenv
-```
-
-A *flake* is also included that exposes the needed variables in the following ways (three ways to choose from, for convenience):
-
-1. as the `paths` (*attrset* type) *passthru* of the *derivation* of the *default package* (to use in other *flakes*).
-2. as exported environment variables in the *default development shell* (`nix develop`).
-3. as text in a file (`nix build` produces the file `./result`).
+* `bin`: compilers (`clang`, `clang++`) and linker (`wasm-ld`)
+* `include`: *libc* headers
+* `include/c++/v1`: *libcxx* headers
+* `lib`: all *libc* and *libcxx* static libraries
+* `lib/wasi`: compiler-rt builtins static library
diff --git a/default.nix b/default.nix
index e96e3cf..dea7af7 100644
--- a/default.nix
+++ b/default.nix
@@ -1,34 +1,21 @@
-{ pkgs, lib, ... }:
+{ pkgs, ... }:
 let
   wasm-llvm = import ./wasm-llvm.nix { inherit pkgs; };
   wasm-libcxx = import ./wasm-libcxx.nix { inherit pkgs; };
   wasi-libc = import ./wasi-libc.nix { inherit pkgs; };
   wasm-compiler-rt = import ./wasm-compiler-rt.nix { inherit pkgs; };
-
-  paths = {
-    WASM_LLVM = wasm-llvm;
-    WASM_LIBCXX_LIB = "${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;
-  };
 }
diff --git a/flake.nix b/flake.nix
index d4bf635..55dec50 100644
--- a/flake.nix
+++ b/flake.nix
@@ -12,6 +12,5 @@
     {
       packages.x86_64-linux.default = package;
       formatter.x86_64-linux = pkgs.nixfmt-rfc-style;
-      devShells.x86_64-linux.default = pkgs.mkShell package.paths;
     };
 }