what's wrong with my command after installing node js

what's wrong with my command after installing node js

Things like this, I install node js with git.All things looks good,I using
the command:
mkdir ~/local
echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
git clone git://github.com/joyent/node.git
cd node
./configure --prefix=~/local
make install
cd ..
git clone git://github.com/isaacs/npm.git
cd npm
make install # or `make link` for bleeding edge
after make node , I find node can't work.So what should do ?