[...]

poldek: Processing dependencies...
poldek: There are 1 package to install:
poldek: I python3-Cython-0.24-1.x86_64
poldek: This operation will use 11.3MB of disk space.
poldek: Need to get 2.3MB of archives.
poldek: Executing rpm --upgrade -vh --test --root / --define _check_dirname_deps 1...
poldek: Preparing...                ##################################################
no conflicts found
checking BR
rpm: error: Failed build dependencies:
rpm: 	libxml2-devel >= 1:2.9.2 is needed by python-lxml-3.6.0-1.src
rpm: 	python3-Cython >= 0.17 is needed by python-lxml-3.6.0-1.src
rpm: Building target platforms: x86_64-tld-linux
installing BR: libxml2\-devel python3\-Cython
+ poldek --noask --caplookup -Q -v --upgrade libxml2-devel python3-Cython
Loading [pndir]local...
Loading [pndir]ti...
Loading [pndir]ti...
Loading [pndir]ti-test...
Loading [pndir]ti-test...
8842 packages read
Removed 352 duplicate packages from available set
libxml2-devel-2.9.1-1.x86_64: equal version installed, skipped
Processing dependencies...
There are 1 package to install:
I python3-Cython-0.24-1.x86_64
This operation will use 11.3MB of disk space.
Need to get 2.3MB of archives. 
Executing rpm --upgrade -vh --root / --define _check_dirname_deps 1...
Preparing...                ##################################################
python3-Cython              ##################################################
building RPM using: set -ex; : build-id: 076fc0ad-59c8-4955-a51d-f51e8010c218; TMPDIR=/tmp/B.15iCGs/BUILD/tmp exec nice -n 19 rpmbuild -bb --define '_smp_mflags -j8' --define '_tld_builder 1' --define '_topdir /tmp/B.15iCGs' --define '_specdir %{_topdir}' --define '_sourcedir %{_specdir}' --define '_rpmdir %{_topdir}/RPMS' --define '_builddir %{_topdir}/BUILD'  --target x86_64-tld-linux /tmp/B.15iCGs/python-lxml.spec
mesg: ttyname failed: Inappropriate ioctl for device
+ : build-id: 076fc0ad-59c8-4955-a51d-f51e8010c218
+ TMPDIR=/tmp/B.15iCGs/BUILD/tmp
+ exec nice -n 19 rpmbuild -bb --define '_smp_mflags -j8' --define '_tld_builder 1' --define '_topdir /tmp/B.15iCGs' --define '_specdir %{_topdir}' --define '_sourcedir %{_specdir}' --define '_rpmdir %{_topdir}/RPMS' --define '_builddir %{_topdir}/BUILD' --target x86_64-tld-linux /tmp/B.15iCGs/python-lxml.spec
error: Failed build dependencies:
	libxml2-devel >= 1:2.9.2 is needed by python-lxml-3.6.0-1.src
Building target platforms: x86_64-tld-linux
ended at: Sat Aug 20 17:02:34 2016, done in 0:00:00.144079
error: No files produced.
mesg: ttyname failed: Inappropriate ioctl for device
+ chmod -R u+rwX /tmp/B.15iCGs/BUILD
+ rm -rf /tmp/B.15iCGs/tmp /tmp/B.15iCGs/BUILD
mesg: ttyname failed: Inappropriate ioctl for device
+ rm -rf /tmp/B.15iCGs
Begin-TLD-Builder-Info
Build-Time: user:2.47s sys:0.36s real:8.19s (faults io:0 non-io:157412)
End-TLD-Builder-Info