Thin-1.2.5 - ERROR: Failed to build gem native extension.

I have devkit installed on my machine so it should build natives without problems, but it is unfortunately not so. This is what I get:

  C:\tee>gem install thin
  Building native extensions.  This could take a while...
  C:\Ruby19\bin\..\devkit\msys\1.0.11\bin\bash.exe: *** Couldn't reserve space for cygwin's heap, Win32 error 0
  ERROR:  Error installing thin:
  ERROR: Failed to build gem native extension.

  C:/Ruby19/bin/ruby.exe extconf.rb
  checking for main() in -lc... no
  creating Makefile

  make
  0 [main] us 0 init_cheap: VirtualAlloc pointer is null, Win32 error 487
  AllocationBase 0x71110000, BaseAddress 0x71110000, RegionSize 0x1000, State 0x1000
  C:\Ruby19\bin\..\devkit\msys\1.0.11\bin\bash.exe: *** Couldn't reserve space for cygwin's heap
  , Win32 error 0


  Gem files will remain installed in C:/Ruby19/lib/ruby/gems/1.9.1/gems/thin-1.2.5 for inspection.
  Results logged to C:/Ruby19/lib/ruby/gems/1.9.1/gems/thin-1.2.5/ext/thin_parser/gem_make.out

  C:\tee>