1 files changed, 7 insertions, 9 deletions
diff --git a/Library/Homebrew/language/node.rb b/Library/Homebrew/language/node.rb
index 03fa9e522..0d02a2ad0 100644
--- a/Library/Homebrew/language/node.rb
+++ b/Library/Homebrew/language/node.rb
@@ -1,7 +1,7 @@
 module Language
   module Node
     def self.npm_cache_config
-      "cache=#{HOMEBREW_CACHE}/npm_cache\n"
+      "cache=#{HOMEBREW_CACHE}/npm_cache"
     end
 
     def self.pack_for_installation
@@ -20,13 +20,9 @@ module Language
     end
 
     def self.setup_npm_environment
-      npmrc = Pathname.new("#{ENV["HOME"]}/.npmrc")
-      # only run setup_npm_environment once per formula
-      return if npmrc.exist?
-      # explicitly set npm's cache path to HOMEBREW_CACHE/npm_cache to fix
-      # issues caused by overriding $HOME (long build times, high disk usage)
-      # https://github.com/Homebrew/brew/pull/37#issuecomment-208840366
-      npmrc.write npm_cache_config
+      # guard that this is only run once
+      return if @env_set
+      @env_set = true
       # explicitly use our npm and node-gyp executables instead of the user
       # managed ones in HOMEBREW_PREFIX/lib/node_modules which might be broken
       begin
@@ -49,6 +45,7 @@ module Language
         -ddd
         --global
         --build-from-source
+        --#{npm_cache_config}
         --prefix=#{libexec}
         #{Dir.pwd}/#{pack}
       ]
@@ -57,9 +54,10 @@ module Language
     def self.local_npm_install_args
       setup_npm_environment
       # npm install args for local style module format
-      %w[
+      %W[
         -ddd
         --build-from-source
+        --#{npm_cache_config}
       ]
     end
   end