emerge redmine problem

When I emerge redmine , the rails’ version is rails-2.3.12. but emerge done, I run “emerge --config www-apps/redmine-9999” need rails-2.3.11

calculate css-11.6 , Please fix it. thanks

development redmine # emerge -pv redmine

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild  N     ] app-arch/cabextract-1.4  USE="-extra-tools" 218 kB [0]
[ebuild  N     ] app-admin/eselect-ruby-20100603  2 kB [0]
[ebuild  N     ] app-admin/eselect-rails-0.17  2 kB [0]
[ebuild  N     ] media-fonts/corefonts-1-r6  USE="-X" 3,599 kB [0]
[ebuild  N     ] dev-db/mysql-init-scripts-2.0_pre1-r2  0 kB [0]
[ebuild  N     ] dev-perl/Net-Daemon-0.480.0  29 kB [0]
[ebuild  N     ] perl-core/Storable-2.250  177 kB [0]
[ebuild  N     ] perl-core/File-Spec-3.330.0  132 kB [0]
[ebuild  N     ] perl-core/Sys-Syslog-0.290.0  78 kB [0]
[ebuild  N     ] dev-lang/ruby-1.8.7_p334-r1  USE="berkdb gdbm ipv6 ncurses readline ssl -debug -doc -examples -libedit -rubytests -socks5 -threads -tk -xemacs" 4,095 kB [0]
[ebuild  N     ] media-gfx/imagemagick-6.6.8.5  USE="bzip2 corefonts cxx openmp perl truetype zlib -X -autotrace -djvu -fftw -fontconfig -fpx -graphviz -gs -hdri -jbig -jpeg -jpeg2k -lcms -lqr -lzma -openexr -png -q32 -q8 -raw -static-libs -svg -tiff -webp -wmf -xml" VIDEO_CARDS="-nvidia" 7,459 kB [0]
[ebuild  N     ] virtual/perl-Storable-2.250  0 kB [0]
[ebuild  N     ] virtual/perl-File-Spec-3.330.0-r1  0 kB [0]
[ebuild  N     ] virtual/perl-Sys-Syslog-0.290.0  0 kB [0]
[ebuild  N     ] dev-ruby/rubygems-1.3.7-r5  USE="-server -test" RUBY_TARGETS="ruby18 -jruby -ree18 (-ruby19)" 285 kB [0]
[ebuild  N     ] dev-perl/PlRPC-0.202.0  18 kB [0]
[ebuild  N     ] dev-ruby/rake-0.8.7-r6  USE="bash-completion -doc -test" RUBY_TARGETS="ruby18 -jruby -ree18 (-ruby19)" 101 kB [0]
[ebuild  N     ] dev-ruby/rmagick-2.13.1  USE="-doc -test" RUBY_TARGETS="ruby18 -ree18 (-ruby19)" 1,158 kB [0]
[ebuild  N     ] dev-ruby/ruby-net-ldap-0.0.4-r1  USE="-test" RUBY_TARGETS="ruby18 -jruby -ree18" 41 kB [0]
[ebuild  N     ] dev-ruby/coderay-0.9.8  USE="-doc -test" RUBY_TARGETS="ruby18 -jruby -ree18 (-ruby19)" 96 kB [0]
[ebuild  N     ] dev-ruby/rdoc-3.6.1  USE="-doc -test" RUBY_TARGETS="ruby18 -jruby -ree18 (-ruby19)" 230 kB [0]
[ebuild  N     ] dev-ruby/text-hyphen-1.0.2  USE="-doc -test" RUBY_TARGETS="ruby18 -jruby -ree18 (-ruby19)" 360 kB [0]
[ebuild  N     ] dev-ruby/tzinfo-0.3.29  USE="-doc -test" RUBY_TARGETS="ruby18 -jruby -ree18 (-ruby19)" 290 kB [0]
[ebuild  N     ] dev-ruby/i18n-0.4.2  USE="-test" RUBY_TARGETS="ruby18 -jruby -ree18" 65 kB [0]
[ebuild  N     ] dev-ruby/builder-2.1.2-r2  USE="-doc -test" RUBY_TARGETS="ruby18 -jruby -ree18" 20 kB [0]
[ebuild  N     ] dev-ruby/rack-1.1.2  USE="-doc -test" RUBY_TARGETS="ruby18 -jruby -ree18 (-ruby19)" 273 kB [0]
[ebuild  N     ] dev-perl/DBI-1.616  USE="-test" 564 kB [0]
[ebuild  N     ] dev-ruby/activesupport-2.3.12  USE="-test" RUBY_TARGETS="ruby18 -jruby -ree18" 421 kB [0]
[ebuild  N     ] dev-ruby/text-format-1.0.0-r3  USE="-test" RUBY_TARGETS="ruby18 -jruby -ree18 (-ruby19)" 29 kB [0]
[ebuild  N     ] dev-ruby/racc-1.4.6  USE="-test" RUBY_TARGETS="ruby18 -jruby -ree18 (-ruby19)" 108 kB [0]
[ebuild  N     ] dev-ruby/actionpack-2.3.12  USE="-doc -test" RUBY_TARGETS="ruby18 -jruby -ree18" 731 kB [0]
[ebuild  N     ] dev-ruby/activeresource-2.3.12  USE="-doc -test" RUBY_TARGETS="ruby18 -jruby -ree18" 46 kB [0]
[ebuild  N     ] dev-ruby/tmail-1.2.7.1-r2  USE="-debug -doc -test" RUBY_TARGETS="ruby18 -jruby -ree18 (-ruby19)" 436 kB [0]
[ebuild  N     ] dev-ruby/actionmailer-2.3.12  USE="-doc -test" RUBY_TARGETS="ruby18 -jruby -ree18" 268 kB [0]
[ebuild  N     ] dev-db/mysql-5.1.56  USE="community perl ssl -big-tables -cluster -debug -embedded -extraengine -latin1 -max-idx-128 -minimal -pbxt -profiling (-selinux) -static -test -xtradb" 25,496 kB [0]
[ebuild  N     ] virtual/mysql-5.1  USE="-embedded -minimal -static" 0 kB [0]
[ebuild  N     ] dev-perl/DBD-mysql-4.19.0  USE="-embedded" 134 kB [0]
[ebuild  N     ] dev-ruby/mysql-ruby-2.8.2-r1  USE="-test" RUBY_TARGETS="ruby18 -ree18 (-ruby19)" 32 kB [0]
[ebuild  N     ] dev-ruby/activerecord-2.3.12  USE="mysql -doc -postgres -sqlite3 -test" RUBY_TARGETS="ruby18 -jruby -ree18" 1,013 kB [0]
[ebuild  N     ] dev-ruby/rails-2.3.12  USE="-doc -test" RUBY_TARGETS="ruby18 -ree18" 238 kB [0]
[ebuild  N     ] www-apps/redmine-9999  USE="git imagemagick mysql -cvs -darcs -mercurial -mongrel -openid -postgres -sqlite3 -subversion" 0 kB [1]

Total: 41 packages (41 new), Size of downloads: 48,233 kB
Portage tree and overlays:
 [0] /usr/portage
 [1] /var/lib/layman/calculate

In portage stable version 2.3.5:

* dev-ruby/rails
     Available versions:  
        (2.3)   2.3.5 ~2.3.11 ~2.3.12
        (3.0)   ~3.0.7 ~3.0.9
        {doc fastcgi ruby_targets_ree18 ruby_targets_ruby18 test}
     Homepage:            http://www.rubyonrails.org
     Description:         ruby on rails is a web-application and persistance framework

Unmask 2.3.11:

echo =dev-ruby/rails-2.3.11 >> /etc/portage/package.mask/ruby