Question

我一直在尝试安装Derby，而且npm一直坚称找不到合适的Express版本。这是我正在使用的命令：npm install -g derby。以下是输出。我正在运行Ubuntu 11.10，节点v0.7.6和npm v1.1.17。难道我做错了什么？我该如何解决这个问题？

npm ERR! Error: No compatible version found: express@'>=2.0.0- <3.0.0-'
npm ERR! Valid install targets:
npm ERR! ["0.14.0","0.14.1","1.0.0beta","1.0.0beta2","1.0.0rc","1.0.0rc2","1.0.0rc3","1.0.0rc4","1.0.0","1.0.1","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7"]
npm ERR!     at installTargetsError (/home/thomas/bin/node/lib/node_modules/npm/lib/cache.js:486:10)
npm ERR!     at next_ (/home/thomas/bin/node/lib/node_modules/npm/lib/cache.js:436:17)
npm ERR!     at next (/home/thomas/bin/node/lib/node_modules/npm/lib/cache.js:413:44)
npm ERR!     at /home/thomas/bin/node/lib/node_modules/npm/lib/cache.js:406:5
npm ERR!     at saved (/home/thomas/bin/node/lib/node_modules/npm/lib/utils/npm-registry-client/get.js:151:7)
npm ERR!     at Object.oncomplete (/home/thomas/bin/node/lib/node_modules/npm/node_modules/graceful-fs/graceful-fs.js:230:7)
npm ERR! You may report this log at:
npm ERR!     <http://github.com/isaacs/npm/issues>
npm ERR! or email it to:
npm ERR!     <npm-@googlegroups.com>
npm ERR! 
npm ERR! System Linux 3.0.0-17-generic
npm ERR! command "node" "/home/thomas/bin/node/bin/npm" "install" "-g" "derby"
npm ERR! cwd /home/thomas
npm ERR! node -v v0.7.6
npm ERR! npm -v 1.1.17
npm ERR! message No compatible version found: express@'>=2.0.0- <3.0.0-'
npm ERR! message Valid install targets:
npm ERR! message ["0.14.0","0.14.1","1.0.0beta","1.0.0beta2","1.0.0rc","1.0.0rc2","1.0.0rc3","1.0.0rc4","1.0.0","1.0.1","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7"]
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /home/thomas/npm-debug.log
npm not ok

Answer 1

Derby需要express v2.x，而express v2.x需要node v0.4.1 =＆gt; 0.7.0预。这意味着npm无法为您找到有效版本的快递，因为您的节点版本v0.7.6不受支持。

您最好的选择是降级Node。您也可以手动安装快递，并希望它实际上兼容，但这可能是一个坏主意。

npm依赖性解析-OR-帮助！我无法安装derbyjs

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