Since I had to cause a local build despite having a substitute, I used ‘guix build clementine --no-grafts --check’, which reported: guix build: error: derivation `/gnu/store/003z966hxvb6hs17sjq4fcwshcqvafxa-clementine-1.3.1-2.4619a4c.drv' may not be deterministic: output `/gnu/store/2vpsjrx7q7wx9715cpc2y1vg5xy7hbfw-clementine-1.3.1-2.4619a4c' differs
‘guix challenge clementine’ reports it to be identical, “because it's just looking at the substitute you downloaded”, as Ludovic said on IRC. -- Thorsten Wilms <t...@freenet.de>