Error installing any ruby version with RVM on OSX

Question

Guys I'm about to kill myself with this one!

I had some problems with RVM installing multiple versions of Ruby, and following a thread on Stackoverflow I decided to remove it completely. After reinstalling RVM, I am unable to install any Ruby version at all.

• Mac OS X
• RVM 1.20.10 stable
• Homebrew 0.9.4

Here are some logs:

rvm install 2.0.0-p0

or:

rvm install 2.0.0-p195 --autolibs=enabled

Searching for binary rubies, this might take some time.
No binary rubies available for: osx/10.8/x86_64/ruby-2.0.0-p0.
Continuing with compilation. Please read 'rvm mount' to get more information on binary rubies.
Installing requirements for osx, might require sudo password.
Already up-to-date.
Installing required packages: autoconf, automake, libtool, pkg-config, libyaml, readline, libxml2, libxslt, libksba, openssl…
Error running 'requirements_osx_brew_libs_install autoconf automake libtool pkg-config libyaml readline libxml2 libxslt libksba openssl',
please read /Users/admin/.rvm/log/ruby-2.0.0-p0/1368903329_package_install_autoconf_automake_libtool_pkg-config_libyaml_readline_libxml2_libxslt_libksba_openssl.log

Logfile reads:

[2013-05-18 22:55:29] requirements_osx_brew_libs_install
Error: No such keg: /usr/local/Cellar/autoconf
There were package installation errors, make sure to read the log.
Check Homebrew requirements github.com/mxcl/homebrew/wiki/Installation

brew doctor

Your system is ready to brew.

brew cleanup

Removing: /Library/Caches/Homebrew/automake-1.13.1.tar.gz…
Error: Permission denied — /Library/Caches/Homebrew/automake-1.13.1.tar.gz

brew reinstall autoconf

Error: No such keg: /usr/local/Cellar/autoconf

Help!

Answer 1

I had the same problem

brew install pkg-config

worked for me

Answer 2

User which is running brew should have write access to This entire directory path

/Library/Caches/Homebrew/Formula

No need to change ownership just write permission. then running rvm works