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