Hi. Spectrum looks very interesting! I look forward to more progress.
I just added it to https://github.com/dckc/awesome-ocap#os

I tried kicking the tires... I set up the binary cache, cloned 2026-03-18
17:11 93839a1 , and then tried `nix-shell --run 'make run'`. My fans spun
for a little while building rust crates, and then I got:

Build completed.
------
Filesystem UUID: d14e3b49-df7d-487c-9d85-8f6f70b51af0
Filesystem total blocks: 2076633 (of 4096-byte blocks)
Filesystem total inodes: 86328
Filesystem total metadata blocks: 19765
Filesystem total deduplicated bytes (of source files): 0
mkdir -p build
veritysetup format \
--root-hash-file build/rootfs.verity.roothash \
-- build/rootfs build/rootfs.verity.superblock
VERITY header information for build/rootfs.verity.superblock.
UUID:             8d368df1-69bb-4f4b-9633-9e1555d3d492
Hash type:       1
Data blocks:     2076633
Data block size: 4096 [bytes]
Hash blocks:     16352
Hash block size: 4096 [bytes]
Hash algorithm:   sha256
Salt:
64d5042171257c589206d50ed727edaeba98da7f7be5dfb3d38b5cf8a5c04288
Root hash:
7919b30b902cda65737af583b1b9c6defeff3a60ba668cc1012300dfd9fa9ef9
Hash device size: 66981888 [bytes]
echo >> build/rootfs.verity.roothash
touch -- build/verity-timestamp
../../scripts/make-gpt.sh build/live.img.tmp \
    build/rootfs.verity.superblock:verity:$(../../scripts/format-uuid.sh
"$(dd if=build/rootfs.verity.roothash bs=32 skip=1 count=1
status=none)"):Spectrum_'0.0.0.verity' \
    build/rootfs:root:$(../../scripts/format-uuid.sh "$(head -c 32
build/rootfs.verity.roothash)"):Spectrum_'0.0.0'
../../scripts/make-gpt.sh: 9: set: Illegal option -o pipefail
make: *** [Makefile:116: build/live.img] Error 2

I'm using nix on Ubuntu 24.04.4 LTS, not NixOS.

As to what version of nixpkgs I might have installed or something, I still
get dizzy every time I try to find out.

-- 
Dan Connolly
https://www.madmode.com