I'm trying to install lazarus from here. I had broken packages, but I fixed the problem by removing sources in

gedit /var/lib/dpkg/status 

as described here. Then I tried to install lazarus again, and the lazarus itself installs, but fpc and fpc-src packages cannot be installed. It gives me this error:

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(Reading database ... 374429 files and directories currently installed.)

Unpacking fpc-src (from /tmp/fpc-src_2.6.2-0_amd64.deb) ...

dpkg: error processing /tmp/fpc-src_2.6.2-0_amd64.deb (--install):

 trying to overwrite '/usr/share/fpcsrc/2.6.2/rtl/nativent/tthread.inc', which is also in package fpc-source-2.6.2 2.6.2-5

dpkg-deb (subprocess): decompressing archive member: internal gzip write error: Broken pipe

dpkg-deb (subprocess): cannot copy archive member from '/tmp/fpc-src_2.6.2-0_amd64.deb' to decompressor pipe: failed to write (Broken pipe)

dpkg-deb: error: subprocess <decompress> returned error exit status 2

Errors were encountered while processing:

If I install regular fpc from software center, it deletes lazarus.

And, before I installed lazarus I removed all previous folders including .lazarus folder in home directory, so, when I install regular lazarus, it says that it's installed in software center, but it cannot be found in dash, although .lazarus folder exists.

I have also tried to remove it by using this instructions,and reinstall, but the same problem persists. I also tried this, and it didn't help too. Please help! Thank you!