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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Philip Kaludercic Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN X-Migadu-Country: US ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1646741258; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to:list-id:list-help: list-unsubscribe:list-subscribe:list-post:dkim-signature; bh=uONfuojKcGvgnzGpjK6KcmuEwhogPubXbj4xvObhRwk=; b=SIo/yOaQQsNtyzIYoEfQBLpC1DO+2Yp8PLZL8N4DXPvq2bj3DXbRhv/XyeIj1Sa+0WHZte 0baBvL9rGK5VlcyKVBxm4W5cCWNxiplBNUOvxOpjaHF/RIj10vYvg6w+UkheiAQRPdEf1m Fy4GgP5hJ3VOFl8dSmQmA7YfCJbJuxgAC62FYw07BzD2f6rxpFU28xp0+LfWMYfh/FE0b8 CtzNnTXpw8gNWotpnjDZ3aBuchprDAv8iDbUaOmYfQmnVI9sJZCVI5v0/kt+94mf57jhF6 pq6DzCrfuNNjc+4pBsypz5n3NFRMfRQUQPEwsqcatt552ZKqUjC/EuXgEOY+sg== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1646741258; a=rsa-sha256; cv=none; b=S07kpLO3rSdWacqPEYZBqgVN4Gm5Ia0puRGUb4Nl98gczn/hb1AZA5hr/2NGp/5gTsJ/dM 3d5BjMEUTiTxb++9dnWRYf5eqH9R0rKiUNOo+4OSMYlXnzTkeUHL0jV68/rFia1hpstQIw MyyMYv2tG9Al55Z40o1pldEtlKzejttIQKNKN6vGGemm4yMczvwQjk7DSLLeK1RH3/jAIq TFomkdrIXM564u/fYXziVD/5OVuI5vuUOmrNXae4DAU4xWXDq+EyzRTGSIpVV5mm2qjw3d SMMuQ8hjTR7m/62HNxgy1YSNx186U8k3eZRv0kSq0f62SKSEIDzpTeM1rhSr7g== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=DWLssLu2; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -7.72 Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=DWLssLu2; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: 86DEB2D845 X-Spam-Score: -7.72 X-Migadu-Scanner: scn0.migadu.com X-TUID: ItB6VnGnQCbj Hi Philip, If I read correctly, the repositority [1] provides many recipes which create various Emacs VM. Cool! Well, from my point of view, these should live in a channel. Maybe the channel guix-past is a good location. Somehow, it would be better to have a channel with binary substitutes. That's the easy part, somehow. Using one of these old Emacs VM, then the user cannot install any Emacs package via Guix -- because the Emacs packages provided by Guix are bytecompiled by the emacs-build-system using the package emacs-minimal and thus although the bytecode is "stable", there is not guarantee that it is compatible. Concretely, guix install emacs@24 emacs-foo then 'M-x foo' and who knows if it would work. The Emacs packages have to be rebuild using the correct Emacs VM -- in the example Emacs 24. >From my point of view, the best is to use packages transformations. Give a look at: https://issues.guix.gnu.org/41732 for instance, let say 'package-with-explicit-emacs' and it would ease to get one old Emacs VM and Emacs packages build with it. WDYT? This 'package-with-explicit-emacs' could be provided by Guix itself; which help for testing 'emacs-next', say. The old Emacs VM could be in a channel, say guix-past. Then, this very same transformation could be applied. Cheers, simon 1: https://git.sr.ht/~pkal/guix-emacs-historical