These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild     U  ] net-libs/libvncserver-0.9.14::desktop-kit [0.9.13-r2::desktop-kit] USE="24bpp filetransfer ipv6 jpeg png ssl threads zlib -gcrypt -gnutls -lzo -sasl -systemd" 0 KiB

Total: 1 package (1 upgrade), Size of downloads: 0 KiB

Would you like to merge these packages? [Yes/No] 

>>> Verifying ebuild manifests

>>> Emerging (1 of 1) net-libs/libvncserver-0.9.14::desktop-kit
 * libvncserver-0.9.14-10e9eb7.tar.gz BLAKE2B SHA512 size ;-) ...        [ ok ]
>>> Unpacking source...
>>> Unpacking libvncserver-0.9.14-10e9eb7.tar.gz to /var/tmp/portage/net-libs/libvncserver-0.9.14/work
>>> Source unpacked in /var/tmp/portage/net-libs/libvncserver-0.9.14/work
>>> Preparing source in /var/tmp/portage/net-libs/libvncserver-0.9.14/work/libvncserver-0.9.14 ...
 * Applying libvncserver-0.9.14-test-fix-includetest.patch ...
/var/tmp/portage/net-libs/libvncserver-0.9.14/temp/environment: line 945: /var/tmp/portage/net-libs/libvncserver-0.9.14/files/libvncserver-0.9.14-test-fix-includetest.patch: No such file or directory
/var/tmp/portage/net-libs/libvncserver-0.9.14/temp/environment: line 948: /var/tmp/portage/net-libs/libvncserver-0.9.14/files/libvncserver-0.9.14-test-fix-includetest.patch: No such file or directory                                  [ !! ]
 * ERROR: net-libs/libvncserver-0.9.14::desktop-kit failed (prepare phase):
 *   patch -p1  failed with /var/tmp/portage/net-libs/libvncserver-0.9.14/files/libvncserver-0.9.14-test-fix-includetest.patch
 * 
 * Call stack:
 *               ebuild.sh, line   93:  Called src_prepare
 *             environment, line 2006:  Called cmake_src_prepare
 *             environment, line  862:  Called default_src_prepare
 *      phase-functions.sh, line  920:  Called __eapi6_src_prepare
 *             environment, line  241:  Called eapply '/var/tmp/portage/net-libs/libvncserver-0.9.14/files/libvncserver-0.9.14-test-fix-includetest.patch' '/var/tmp/portage/net-libs/libvncserver-0.9.14/files/libvncserver-0.9.14-test-fix-tjunittest.patch'
 *             environment, line 1013:  Called _eapply_patch '/var/tmp/portage/net-libs/libvncserver-0.9.14/files/libvncserver-0.9.14-test-fix-includetest.patch'
 *             environment, line  951:  Called __helpers_die 'patch -p1  failed with /var/tmp/portage/net-libs/libvncserver-0.9.14/files/libvncserver-0.9.14-test-fix-includetest.patch'
 *   isolated-functions.sh, line  112:  Called die
 * The specific snippet of code:
 *   		die "$@"