Broken dependencies on CentOS 6.4: can install nodejs but not npm

I'm using a fresh installed CentOS 6.4 (x86-64) with the EPEL repository.

$ yum install nodejs
...
$ node -v
v0.10.5

So far, so good, but when I try to install npm, I'll get this error message:

$ yum install npm
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: ftp.halifax.rwth-aachen.de
 * epel: mirror.fraunhofer.de
 * extras: centos.psw.net
 * updates: centos.psw.net
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package npm.noarch 0:1.2.17-5.el6 will be installed
--> Processing Dependency: npm(which) < 2 for package: npm-1.2.17-5.el6.noarch
--> Processing Dependency: npm(uid-number) < 1 for package: npm-1.2.17-5.el6.noarch
--> Processing Dependency: npm(tar) < 0.2 for package: npm-1.2.17-5.el6.noarch
--> Processing Dependency: npm(slide) < 2 for package: npm-1.2.17-5.el6.noarch
--> Processing Dependency: npm(semver) < 1.2 for package: npm-1.2.17-5.el6.noarch
...
(skipped)
...
--> Finished Dependency Resolution
Error: Package: nodejs-npmlog-0.0.2-4.el6.noarch (epel)
           Requires: npm(ansi) < 0.2
Error: Package: npm-1.2.17-5.el6.noarch (epel)
           Requires: npm(ansi) < 0.2
Error: Package: nodejs-npmlog-0.0.2-4.el6.noarch (epel)
           Requires: npm(ansi) >= 0.1.2
Error: Package: npm-1.2.17-5.el6.noarch (epel)
           Requires: npm(ansi) >= 0.1.2
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

The complete output is quite big: http://pastebin.com/raw.php?i=Ce3ZJsEB

What should I do? The --skip-broken workaround doesn't seem to be right solution.

Here is the output of yum repolist:

Loaded plugins: fastestmirror, refresh-packagekit, security
Determining fastest mirrors
 * base: centos.copahost.com
 * epel: mirror.fraunhofer.de
 * extras: ftp-stud.fht-esslingen.de
 * updates: centos.copahost.com
 repo id       repo name                                            status
 base          CentOS-6 - Base                                      6,381
 epel          Extra Packages for Enterprise Linux 6 - x86_64       8,909
 extras        CentOS-6 - Extras                                       12
 updates       CentOS-6 - Updates                                     727
 repolist: 16,029