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Error installing rails: actionpack requires rack-mount (~> 0.4.0, runtime)

#3918

I install all the gems for rails 3.0 pre release and I get this error when I try to run gem install rails --pre Error installing rails:

actionpack requires rack-mount (~> 0.4.0, runtime)

I have rack-mount 0.5.0 so I'm not sure what's going on here.

Reported by the_programmer · February 10th, 2010 @ 04:51 AM

State: invalid
Milestone: none
Assigned to: nobody
Importance: none

Activity

  1. Bachir El Khoury
    Bachir El Khoury

    it requires that exact version of rack-mount for some reason.

    install version 0.4.0 and it should all be fine

    gem install rack-mount --version=0.4.0

    February 10th, 2010 @ 05:25 AM

  2. José Valim
    José Valim
    • State changed from new to invalid

    The dependency is "~> 0.4.0", this means it accepts any "0.4.x" version. "0.5.0" is not accepted.

    February 10th, 2010 @ 06:40 AM

  3. chenillen
    chenillen

    That's the problem, i have 0.5.0 installed but it still need -> 0.4.0

    But install 0.4.0 works for me, that's weird

    February 10th, 2010 @ 06:01 PM

  4. Deleted User
    Deleted User
    • Tag set to documentation

    OK, installation notes on http://guides.rails.info/3_0_release_notes.html don't tell you to install rack-mount 0.4.0, that can be confusing if you just copy-paste the instructions

    February 14th, 2010 @ 10:51 AM