From b1b41a23f4e48e35bafe282029190bba32cb7218 Mon Sep 17 00:00:00 2001
From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Date: Wed, 5 May 2021 15:18:05 -0400
Subject: [PATCH] build: Do not compress the (already compressed) VM qcow2
 images.

The qcow2 format supports compression, and the qcow2 type supported by 'guix
system image' produces compressed qcow2 images.

* Makefile.am (release): Do not re-compress the qcow2 VM images with xz.
* doc/guix.texi (Running Guix in a VM): Adjust VM image URL.
---
 Makefile.am   | 4 +---
 doc/guix.texi | 2 +-
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index c6028c586a..d06e1779ca 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -900,9 +900,7 @@ release: dist-with-updated-version all
 	    echo "failed to produced Guix VM image for $$system" >&2 ;			\
 	    exit 1 ;									\
 	  fi ;										\
-	  xz < "$$image" > "$(releasedir)/$(GUIX_SYSTEM_VM_IMAGE_BASE).$$system.qcow2.xz.tmp" ;	\
-	  mv "$(releasedir)/$(GUIX_SYSTEM_VM_IMAGE_BASE).$$system.qcow2.xz.tmp"			\
-	     "$(releasedir)/$(GUIX_SYSTEM_VM_IMAGE_BASE).$$system.qcow2.xz" ;			\
+	  cp "$$image" "$(releasedir)/$(GUIX_SYSTEM_VM_IMAGE_BASE).$$system.qcow2";	\
 	done
 	@echo
 	@echo "Congratulations!  All the release files are now in $(releasedir)."
diff --git a/doc/guix.texi b/doc/guix.texi
index 7f54ddfb3c..9beef61c94 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -33491,7 +33491,7 @@ Whether or not the droplet should be created with IPv6 networking.
 @cindex virtual machine
 To run Guix in a virtual machine (VM), one can use the pre-built Guix VM image
 distributed at
-@url{@value{BASE-URL}/guix-system-vm-image-@value{VERSION}.x86_64-linux.qcow2.xz}.
+@url{@value{BASE-URL}/guix-system-vm-image-@value{VERSION}.x86_64-linux.qcow2}.
 This image is a compressed image in QCOW format.  You will first need to
 decompress with @command{xz -d}, and then you can pass it to an emulator such
 as QEMU (see below for details).