title: Bcrypt Installation error `node-pre-gyp install --fallback-to-build
body: <p>I am trying to Install bcrypt but getting errors. I have also tired to install older version but still getting same error.</p>
  
  <p>I had tried to globally install dependancy NPM "node-gyp" but still getting errors.</p>
  
  <p>Error screenshot
  <a href="https://screencast.com/t/ADSe6khYE6pm" rel="noreferrer">https://screencast.com/t/ADSe6khYE6pm</a></p>
  
  <pre><code>bcrypt@3.0.3 install /Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt
  
  node-pre-gyp install --fallback-to-build
  
  node-pre-gyp WARN Using request for node-pre-gyp https download
  node-pre-gyp WARN Tried to download(404): https://github.com/kelektiv/node.bcrypt.js/releases/download/v3.0.3/bcrypt_lib-v3.0.3-node-v64-darwin-x64-unknown.tar.gz
  node-pre-gyp WARN Pre-built binaries not found for bcrypt@3.0.3 and node@10.9.0 (node-v64 ABI, unknown) (falling back to source compile with node-gyp)
  No receipt for 'com.apple.pkg.CLTools_Executables' found at '/'.
  
  No receipt for 'com.apple.pkg.DeveloperToolsCLILeo' found at '/'.
  
  No receipt for 'com.apple.pkg.DeveloperToolsCLI' found at '/'.
  
  gyp: No Xcode or CLT version detected!
  gyp ERR! configure error
  gyp ERR! stack Error: gyp failed with exit code: 1
  gyp ERR! stack at ChildProcess.onCpExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:345:16)
  gyp ERR! stack at ChildProcess.emit (events.js:182:13)
  gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:239:12)
  gyp ERR! System Darwin 17.5.0
  gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "configure" "--fallback-to-build" "--module=/Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt/lib/binding/bcrypt_lib.node" "--module_name=bcrypt_lib" "--module_path=/Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt/lib/binding" "--napi_version=3" "--node_abi_napi=napi" "--napi_build_version=0" "--node_napi_label=node-v64"
  gyp ERR! cwd /Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt
  gyp ERR! node -v v10.9.0
  gyp ERR! node-gyp -v v3.7.0
  gyp ERR! not ok
  node-pre-gyp ERR! build error
  node-pre-gyp ERR! stack Error: Failed to execute '/usr/local/bin/node /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt/lib/binding/bcrypt_lib.node --module_name=bcrypt_lib --module_path=/Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt/lib/binding --napi_version=3 --node_abi_napi=napi --napi_build_version=0 --node_napi_label=node-v64' (1)
  node-pre-gyp ERR! stack at ChildProcess. (/Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
  node-pre-gyp ERR! stack at ChildProcess.emit (events.js:182:13)
  node-pre-gyp ERR! stack at maybeClose (internal/child_process.js:961:16)
  node-pre-gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:250:5)
  node-pre-gyp ERR! System Darwin 17.5.0
  node-pre-gyp ERR! command "/usr/local/bin/node" "/Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt/node_modules/.bin/node-pre-gyp" "install" "--fallback-to-build"
  node-pre-gyp ERR! cwd /Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt
  node-pre-gyp ERR! node -v v10.9.0
  node-pre-gyp ERR! node-pre-gyp -v v0.12.0
  node-pre-gyp ERR! not ok
  Failed to execute '/usr/local/bin/node /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt/lib/binding/bcrypt_lib.node --module_name=bcrypt_lib --module_path=/Users/rigalpatel/rect-practice/vidly-api-node/node_modules/bcrypt/lib/binding --napi_version=3 --node_abi_napi=napi --napi_build_version=0 --node_napi_label=node-v64' (1)
  npm WARN vidly@1.0.0 No repository field.
  
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! bcrypt@3.0.3 install: node-pre-gyp install --fallback-to-build
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the bcrypt@3.0.3 install script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  </code></pre>
  
  <p>Environments</p>
  
  <p>OS: Mac 10.13.4
  Node 10.9.0
  NPM 6.2.0</p>
  
  <p>Thanks</p>