Replace npmCmd parameter with installCommands

API.md

@@ -14,7 +14,7 @@ The `node_modules` function takes an attribute set with the following attributes
 - **packageJson** *(default `src+"/package.json"`)*: Path to `package.json`
 - **packageLockJson** *(default `src+"/package-lock.json"`)*: Path to `package-lock.json`
 - **nodejs** *(default `nixpkgs.nodejs`, which is the Active LTS version)*: Node.js derivation to use
-- **npmCmd** *(default `npm install --offline`)*: npm command to install dependencies
+- **installCommands** *(default `[ "npm install --offline --nodedir=${nodeSource nodejs}" ]`)*: List of commands to install dependencies.
 - **preInstallLinks** *(default `{}`)*: Map of symlinks to create inside npm dependencies in the `node_modules` output (See [Concepts](#concepts) for details).
 - **githubSourceHashMap** *(default `{}`)*: Dependency hashes for evaluation in restricted mode (See [Concepts](#concepts) for details).
 

internal.nix

@@ -290,7 +290,7 @@ rec {
     , buildInputs ? [ ]
     , nativeBuildInputs ? [ ]
     , nodejs ? default_nodejs
-    , npmCmd ? "npm install --offline"
+    , installCommands ? [ "npm install --offline --nodedir=${nodeSource nodejs}" ]
     , preBuild ? ""
     , postBuild ? ""
     , preInstallLinks ? { } # set that describes which files should be linked in a specific packages folder
@@ -386,7 +386,7 @@ rec {
           declare -pf > $TMP/preinstall-env
           ln -s ${preinstall_node_modules}/node_modules/.hooks/prepare node_modules/.hooks/preinstall
           export HOME=.
-          ${npmCmd} --nodedir=${nodeSource nodejs}
+          ${lib.concatStringsSep "\n" installCommands}
           test -d node_modules/.bin && patchShebangs node_modules/.bin
           rm -rf node_modules/.hooks
           runHook postBuild