[intuitive-build-install] Python3 conflict when rebuilding my kernel

I've done pmbootstrap install succesfully. After that I make a change in my kernel config and run pmbootstrap install again and it fails:

[18:13:55] *** (1/5) PREPARE NATIVE CHROOT ***
[18:13:55] *** (2/5) CREATE DEVICE ROOTFS (motorola-titan) ***
[18:13:58] WARNING: armhf package 'so:libpython3.so' installed version 3.6.1-r4 is newer, than the version in the repositories: 3.4.5-r2
[18:13:58] (native) build armhf/linux-motorola-titan-3.4.42-r2.apk
[18:16:17] (rootfs_motorola-titan) install
[18:16:18] NOTE: The failed command's output is above the ^^^ line in the logfile: /var/pmbootstrap/master/log.txt
[18:16:18] ERROR: Command failed: (rootfs_motorola-titan) % apk --no-progress add -u /home/user/packages/user/armhf/linux-motorola-titan-3.4.42-r2.apk python3.4-dev pkgconfig python3.4
[18:16:18] Run 'pmbootstrap log' for details.
[18:16:18] See also: https://github.com/postmarketOS/pmbootstrap/wiki/Troubleshooting

Log shows:

(003404) [18:16:17] (rootfs_motorola-titan) install
(003404) [18:16:17] (rootfs_motorola-titan) % apk --no-progress add -u /home/user/packages/user/armhf/linux-motorola-titan-3.4.42-r2.apk python3.4-dev pkgconfig python3.4
ERROR: unsatisfiable constraints:
  python3-3.6.1-r4:
    conflicts:
               python3.4-3.4.5-r2[so:libpython3.so=0]
    satisfies: world[python3]
               mkbootimg-7.1.2_r6-r1[python3]
  python3.4-3.4.5-r2:
    conflicts:
               python3-3.6.1-r4[so:libpython3.so=0]
    satisfies: world[python3.4]
               python3.4-dev-3.4.5-r2[python3.4=3.4.5-r2]
(003404) [18:16:18] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(003404) [18:16:18] NOTE: The failed command's output is above the ^^^ line in the logfile: /var/pmbootstrap/master/log.txt
(003404) [18:16:18] ERROR: Command failed: (rootfs_motorola-titan) % apk --no-progress add -u /home/user/packages/user/armhf/linux-motorola-titan-3.4.42-r2.apk python3.4-dev pkgconfig python3.4
(003404) [18:16:18] Run 'pmbootstrap log' for details.
(003404) [18:16:18] See also: https://github.com/postmarketOS/pmbootstrap/wiki/Troubleshooting
(003404) [18:16:18] Traceback (most recent call last):

I have no idea why it tries to install python3.4-dev and python3.4.

pablo@pablo-sch ~/src/pmbootstrap  $ ./pmbootstrap.py chroot 
/ # find|grep libpython                                                                                                                                                                                          
./mnt/rootfs_motorola-titan/usr/lib/libpython3.so                                                                                                                                                                
./mnt/rootfs_motorola-titan/usr/lib/libpython3.6m.so.1.0                                                                                                                                                         
./usr/lib/libpython2.7.so.1.0                                                                                                                                                                                    
find: ./proc/4603/task/4603/fdinfo/487: No such file or directory                                                                                                                                                
./home/user/git/aports_upstream/main/boost/boost-1.57.0-python-libpython_dep.patch                                                                                                                               
/ # [18:18:17] Done

pablo@pablo-sch ~/src/pmbootstrap  $ ./pmbootstrap.py chroot --suffix=rootfs_motorola-titan                                                                                                                      
/ # find|grep libpython                                                                                                                                                                                          
./usr/lib/libpython3.so                                                                                                                                                                                          
./usr/lib/libpython3.6m.so.1.0
find: ./proc/4516/task/4541/fdinfo/415: No such file or directory
find: ./proc/4824/task/4828/fd/425: No such file or directory
find: ./proc/22576: No such file or directory
./home/user/git/aports_upstream/main/boost/boost-1.57.0-python-libpython_dep.patch