Hello,
I build the SDK with bitbake core-image-base -c populate_sdk and it works just fine. But trying to build the eSDK with bitbake core-image-base -c populate_sdk_ext results in this error:

ERROR: buildtools-tarball-1.0-r0 do_populate_sdk: Unable to install packages. Command '/opt/build/tmp/work/x86_64-nativesdk-pokysdk-linux/buildtools-tarball/1.0-r0/recipe-sysroot-native/usr/bin/opkg --volatile-cache -f /opt/build/tmp/work/x86_64-nativesdk-pokysdk-linux/buildtools-tarball/1.0-r0/opkg.conf -t /opt/build/tmp/work/x86_64-nativesdk-pokysdk-linux/buildtools-tarball/1.0-r0/temp/ipktemp/ -o /opt/build/tmp/work/x86_64-nativesdk-pokysdk-linux/buildtools-tarball/1.0-r0/sdk/image/opt/my-os/0.1/sysroots/none  --force_postinstall --prefer-arch-to-version   install cppzmq-dev googletest-dev libappcommunicator-dev liblogger-dev libmodbus-dev libmyos-common-dev protobuf-c zeromq-staticdev' returned 255:
Collected errors:
 * opkg_prepare_url_for_install: Couldn't find anything to satisfy 'cppzmq-dev'.

ERROR: Logfile of failure stored in: /opt/build/tmp/work/x86_64-nativesdk-pokysdk-linux/buildtools-tarball/1.0-r0/temp/log.do_populate_sdk.155
ERROR: Task (/opt/yocto/poky/meta/recipes-core/meta/buildtools-tarball.bb:do_populate_sdk) failed with exit code '1'


The listed Packeges are set in the TOOLCHAIN_TARGET_TASK variable. I tryed using IMAGE_INSTALL_append but this didn't help.
Does someone have an idea?

greetings
Alex