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Wilco van Esch

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    Target pattern contains no `%'

    When updating gems in Windows for Ruby 1.9.3 (or earlier), you may get an error message like:

    creating Makefile

make  clean
Makefile:165: *** target pattern contains no `%'.  Stop.

make
Makefile:165: *** target pattern contains no `%'.  Stop.

make failed, exit code 2

    To fix this, downgrade your RubyGems version:

    gem update --system 1.8.29