I'm working on setting up ungoogled-chromium on a fresh Ubuntu 22.04.3 LTS (Jammy Jellyfish) install, and I'm running into a couple of roadblocks. Any help would be greatly appreciated!

1. Compiler Dependencies Missing

Initially, I hit a snag with missing compiler dependencies, getting an error about "Unmet build dependencies" from dpkg-checkbuilddeps. Thankfully, with some guidance from the community, I was able to add the necessary LLVM repository to get 'clang-16', 'lld-16', and their related development packages.

2. Current Build Error - Invalid Substitution Type

After sorting out the dependencies, a new error cropped up during the build process:

ERROR at //build/nocompile.gni:149:9: Invalid substitution type.
        args += [ "{{cflags}}" ] 

It seems the substitution {{cflags}} isn't appropriate for something working on a source file like this. I've checked the build script at //third_party/blink/renderer/platform/BUILD.gn:2013:3 but couldn't pinpoint the issue.

Steps Taken:

• Followed the installation instructions provided by ungoogled-chromium.
• Successfully added the LLVM repository to install the required compiler toolchain.
• Tried clean rebuilds after sorting out dependencies.

System Information:

• OS: Ubuntu 22.04.3 LTS (Jammy Jellyfish)
• Kernel: 6.1.58+