Unable to find RubyGems in site_ruby or core Ruby？

Question

I want to install ruby on my windows,

  ruby dk.rb init

then modify config.yml, and install:

E:\devkit>ruby dk.rb install

but the output is error:

[ERROR] Unable to find RubyGems in site_ruby or core Ruby. Please
install RubyGems and rerun 'ruby dk.rb install'.

Did I lose something?

Answer 1

I had the same problem but could not resolve it for a day even after going through every answer here. In the end I realized that you need to remove the comments not just for the "C:/path_to_ruby" but also for the three "---" at the beginning, for this to work.

Answer 2

Have you looked at the instructions in this site http://rubyinstaller.org/ it really helped me when i try to do that.

Here is another site to help you out https://www.ruby-lang.org/en/downloads/

Answer 3

The way I solved it, was to open up my config.yml, and put in

- C:/path_to_ruby

That's it. Just the root directory. Note that the slashes are /, and not backslashes, just incase you copy paste from address bar.

Answer 4

My problem is I did include the path to Ruby in my config.yml, the error still exists. It turned out somehow I had two paths:

- e:/Program Files (x86)/Heroku/ruby-1.9.2
- C:/Ruby22-x64

After deleting the first path, it works fine.

Answer 5

I had this same problem and here is what I had to do for what its worth.

1. First of all I was not running command prompt as admin
2. Next I had to add my Ruby main folder path to config.yml

After I did both of these things, it installed correctly.

Answer 6

This same issue happened to my ruby installation obtained from compiled source on a Windows 8.1 box.

In my case 'ruby dk.rb init' was not able to populate the existing ruby installation, so I manually entered it into the config.yml file.

So, instead of adding the rubydir absolute path (i.e. C:/ruby215), I had to enter the following:

-- << absolute-path-to-ruby-install >>/usr

For example: - C:/ruby215/usr

Afterward the command 'ruby dk.rb install' ran successfully.

Answer 7

I had 7 different paths in my config.yml file for 3 different Rubys. This because I wanted clean rubies for different projects.

I was using Windows, so used the rubyinstaller to create ruby directories. I had one "ruby" directory from a gz that was not proper (but followed the convention I was using) and should have been deleted. When I ran dk it choked on that directory, didn't mention it specifically in the error messages but it was next in line. Deleted the directory and the listing in the config.yml file and life became sweet again.

Answer 8

DevKit installation gives error. If you are using Ruby for 64bit, uninstall the the Ruby and DevKit. Installing 32bit version of Ruby and DevKit solved my problem.