* Error: The above package list contains packages which cannot be
 * installed at the same time on the same system.

  (dev-python/pillow-6.2.2:0/0::gentoo, ebuild scheduled for merge) pulled in by
    dev-python/pillow[tiff,truetype,jpeg(+),python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,-python_single_target_python3_6(-),-pyth
on_single_target_python3_7(-),-python_single_target_python3_8(-)] (dev-python/pillow[tiff,truetype,jpeg(+),python_targets_python3_6(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)]) required by (dev-python/reportlab-3.5.13-r1:0/0::gentoo, installed) USE="-doc -examples" ABI_X86="(64)" PYTHON_TARGETS="python3_6 -python3_7 (-python3_8)"
    dev-python/pillow[python_targets_python2_7(-)?,python_targets_python3_6(-)?,python_targets_python3_7(-)?,-python_single_target_python2_7(-),-python_single_target_pytho
n3_6(-),-python_single_target_python3_7(-)] (dev-python/pillow[python_targets_python2_7(-),python_targets_python3_6(-),-python_single_target_python2_7(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-)]) required by (sci-libs/scipy-1.1.0:0/0::gentoo, installed) USE="-doc -sparse -test" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_6 -python3_7"
    >=dev-python/pillow-3.1.1[python_targets_python3_6(-)] required by (net-print/hplip-3.19.12-r1:0/0::gentoo, installed) USE="hpcups hpijs libnotify policykit qt5 scanne
r snmp -X -doc -fax -kde -libressl -libusb0 -minimal -parport -static-ppds" ABI_X86="(64)" PYTHON_SINGLE_TARGET="python3_6 -python3_7"
    >=dev-python/pillow-3.2.0[python_targets_python3_6(-)] required by (app-text/calibre-4.11.2:0/0::gentoo, installed) USE="ios udisks" ABI_X86="(64)" PYTHON_SINGLE_TARGE
T="python3_6 -python3_7"
    >=dev-python/pillow-4.0.0[python_targets_python3_6(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)] require
d by (dev-python/nototools-0_pre20200207:0/0::gentoo, binary scheduled for merge) USE="" ABI_X86="(64)" PYTHON_TARGETS="python3_6 -python3_7 (-python3_8)"

  (dev-python/pillow-6.2.2-r1:2.7/2.7::calculate, binary scheduled for merge) pulled in by
    dev-python/pillow[python_targets_python2_7] required by (sys-apps/calculate-utils-3.6.7.32:3/3::calculate, binary scheduled for merge) USE="backup client console dbus 
desktop gpg install qt5 -minimal -pxe (-server)" ABI_X86="(64)" PYTHON_TARGETS="python2_7"


For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):

https://wiki.gentoo.org/wiki/Handbook:X86/Working/Portage#Blocked_packages