19.04: Install fails

[brs17]

Distribution (run cat /etc/os-release):
Pop!_OS 19.04

Issue
Installation of Pop!_OS 19.04 (debug iso #8) fails.

Installation logs:
installer.log

[INFO distinst:crates/chroot/src/command.rs:112] Writing new source list
[INFO distinst:crates/chroot/src/command.rs:112] Source list entries for this disc are:
[INFO distinst:crates/chroot/src/command.rs:112] deb cdrom:[Pop_OS 19.04 _Disco_ - Release amd64 (20190131)]/ disco main restricted
[INFO distinst:crates/chroot/src/command.rs:112] Repeat this process for the rest of the CDs in your set.
[INFO distinst:src/installer/steps/configure/chroot_conf.rs:30] installing packages: ["kernelstub", "intel-microcode", "system76-driver", "e2fsprogs", "dosfstools"]
[INFO distinst:crates/chroot/src/command.rs:103] running "chroot" "/tmp/distinst.lel3EDJEnjmY" "apt-get" "install" "-q" "-y" "-o" "Acquire::cdrom::AutoDetect=0" "-o" "Acquire::cdrom::mount=/cdrom" "-o" "APT::CDROM::NoMount=1" "kernelstub" "intel-microcode" "system76-driver" "e2fsprogs" "dosfstools"
[INFO distinst:crates/chroot/src/command.rs:112]   en_US.UTF-8... done
[INFO distinst:crates/chroot/src/command.rs:103] running "chroot" "/tmp/distinst.lel3EDJEnjmY" "update-locale" "--reset" "LANG=en_US.UTF-8"
[INFO distinst:crates/chroot/src/command.rs:112] Generation complete.
[WARN distinst:crates/chroot/src/command.rs:113] E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/f/flex/libfl2_2.6.4-6.2_amd64.deb  Temporary failure resolving 'us.archive.ubuntu.com'
[WARN distinst:crates/chroot/src/command.rs:113] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
[ERROR distinst:src/installer/state.rs:37] configuring chroot error: failed to install packages: command failed with exit status: exit code: 100
[ERROR distinst:src/installer/mod.rs:277] errored while installing system: failed to install packages: command failed with exit status: exit code: 100
[INFO distinst:ffi/src/installer.rs:192] Install error: failed to install packages: command failed with exit status: exit code: 100

[brs17]

It appears currently an installation requires network access to complete successfully.