die "The source directory '${S}' doesn't exist"

>>> Failed to emerge sys-apps/ramdisk-1.1.6, Log file:
>>>  '/var/tmp/portage/sys-apps/ramdisk-1.1.6/temp/build.log'
>>> Jobs: 1 of 4 complete, 1 failed                 Load avg: 1.90, 2.70, 1.42
 * Package:    sys-apps/ramdisk-1.1.6
 * Repository: core-kit
 * USE:        amd64 elibc_glibc kernel_linux python_targets_python3_9 userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
>>> Unpacking funtoo_ramdisk-1.1.6.tar.gz to /var/tmp/portage/sys-apps/ramdisk-1.1.6/work
>>> Source unpacked in /var/tmp/portage/sys-apps/ramdisk-1.1.6/work
 * ERROR: sys-apps/ramdisk-1.1.6::core-kit failed (prepare phase):
 *   The source directory '/var/tmp/portage/sys-apps/ramdisk-1.1.6/work/funtoo-ramdisk-1.1.6' doesn't exist
 * 
 * Call stack:
 *            ebuild.sh, line  731:  Called __ebuild_main 'prepare'
 *   phase-functions.sh, line 1050:  Called __dyn_prepare
 *   phase-functions.sh, line  384:  Called die
 * The specific snippet of code:
 *   		die "The source directory '${S}' doesn't exist"
 * 
 * If you need support, post the output of `emerge --info '=sys-apps/ramdisk-1.1.6::core-kit'`,
 * the complete build log and the output of `emerge -pqv '=sys-apps/ramdisk-1.1.6::core-kit'`.
 * The complete build log is located at '/var/tmp/portage/sys-apps/ramdisk-1.1.6/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-apps/ramdisk-1.1.6/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-apps/ramdisk-1.1.6/homedir'
 * S: '/var/tmp/portage/sys-apps/ramdisk-1.1.6/work/funtoo-ramdisk-1.1.6'

 * Messages for package sys-apps/ramdisk-1.1.6:

 * ERROR: sys-apps/ramdisk-1.1.6::core-kit failed (prepare phase):
 *   The source directory '/var/tmp/portage/sys-apps/ramdisk-1.1.6/work/funtoo-ramdisk-1.1.6' doesn't exist
 * 
 * Call stack:
 *            ebuild.sh, line  731:  Called __ebuild_main 'prepare'
 *   phase-functions.sh, line 1050:  Called __dyn_prepare
 *   phase-functions.sh, line  384:  Called die
 * The specific snippet of code:
 *   		die "The source directory '${S}' doesn't exist"
 * 
 * If you need support, post the output of `emerge --info '=sys-apps/ramdisk-1.1.6::core-kit'`,
 * the complete build log and the output of `emerge -pqv '=sys-apps/ramdisk-1.1.6::core-kit'`.
 * The complete build log is located at '/var/tmp/portage/sys-apps/ramdisk-1.1.6/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-apps/ramdisk-1.1.6/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-apps/ramdisk-1.1.6/homedir'
 * S: '/var/tmp/portage/sys-apps/ramdisk-1.1.6/work/funtoo-ramdisk-1.1.6'

 * GNU info directory index is up-to-date.
 * After world updates, it is important to remove obsolete packages with
 * emerge --depclean. Refer to `man emerge` for more information.