Redmine

I have debian 8 with Apache 2.4, MariaDB 10.1 and PHP 5.6.

I try install Redmine by command:

# aptitude install redmine redmine-mysql

I follow all commands, but now when I want set up DB, it still set this error:

root@vmsrv-www1:~# aptitude install redmine redmine-mysql
The following partially installed packages will be configured:
  redmine
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.
Setting up redmine (3.0~20140825-5) ...
dbconfig-common: writing config to /etc/dbconfig-common/redmine/instances/default.conf

Creating config file /etc/redmine/default/database.yml.new with new version
granting access to database redmine_default for redmine_default@localhost: already exists.
creating database redmine_default: already exists.
dbconfig-common: flushing administrative password
Could not find gem 'mysql2 (~> 0.3.11) ruby' in the gems available on this machine.
Run `bundle install` to install missing gems.
dpkg: error processing package redmine (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 redmine
E: Sub-process /usr/bin/dpkg returned an error code (1)
Failed to perform requested operation on package.  Trying to recover:
Setting up redmine (3.0~20140825-5) ...
dbconfig-common: writing config to /etc/dbconfig-common/redmine/instances/default.conf

Creating config file /etc/redmine/default/database.yml.new with new version
granting access to database redmine_default for redmine_default@localhost: already exists.
creating database redmine_default: already exists.
dbconfig-common: flushing administrative password
Could not find gem 'mysql2 (~> 0.3.11) ruby' in the gems available on this machine.
Run `bundle install` to install missing gems.
dpkg: error processing package redmine (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 redmine

If I try install mysql2 gem by commnad:

gem install mysql2

I get this error:

root@vmsrv-www1:~# gem install mysql2
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
        ERROR: Failed to build gem native extension.

    /usr/bin/ruby2.1 extconf.rb
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
-----
Using mysql_config at /usr/bin/mysql_config
-----
checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
-----
Don't know how to set rpath on your system, if MySQL libraries are not in path mysql2 may not load
-----
-----
Setting libpath to /usr/lib
-----
creating Makefile

make "DESTDIR=" clean

make "DESTDIR=" 
compiling mysql2_ext.c
compiling client.c
compiling result.c
compiling infile.c
compiling statement.c
linking shared-object mysql2/mysql2.so
/usr/bin/ld: cannot find -lssl
/usr/bin/ld: cannot find -lcrypto
collect2: error: ld returned 1 exit status
Makefile:232: recipe for target 'mysql2.so' failed
make: *** [mysql2.so] Error 1

make failed, exit code 2

Gem files will remain installed in /var/lib/gems/2.1.0/gems/mysql2-0.4.2 for inspection.
Results logged to /var/lib/gems/2.1.0/extensions/x86_64-linux/2.1.0/mysql2-0.4.2/gem_make.out

Can anybody help what now?