diff --git a/Makefile.am b/Makefile.am
index 24a803a21a..35d72f36fe 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -655,9 +655,9 @@ release: dist
 	    echo "failed to produced GuixSD installation image for $$system" >&2 ;	\
 	    exit 1 ;									\
 	  fi ;										\
-	  xz < "$$image" > "$(releasedir)/$(GUIXSD_IMAGE_BASE).$$system.xz.tmp" ;	\
-	  mv "$(releasedir)/$(GUIXSD_IMAGE_BASE).$$system.xz.tmp"			\
-	     "$(releasedir)/$(GUIXSD_IMAGE_BASE).$$system.xz" ;				\
+	  xz < "$$image" > "$(releasedir)/$(GUIXSD_IMAGE_BASE).$$system.iso.xz.tmp" ;	\
+	  mv "$(releasedir)/$(GUIXSD_IMAGE_BASE).$$system.iso.xz.tmp"			\
+	     "$(releasedir)/$(GUIXSD_IMAGE_BASE).$$system.iso.xz" ;			\
 	done
 	for system in $(GUIXSD_VM_SYSTEMS) ; do						\
 	  image=`$(top_builddir)/pre-inst-env						\
diff --git a/doc/guix.texi b/doc/guix.texi
index 182dcd82ee..c39e495060 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -7855,7 +7855,7 @@ about their support in GNU/Linux.
 
 An ISO-9660 installation image that can be written to a USB stick or
 burnt to a DVD can be downloaded from
-@indicateurl{ftp://alpha.gnu.org/gnu/guix/guixsd-install-@value{VERSION}.@var{system}.xz},
+@indicateurl{ftp://alpha.gnu.org/gnu/guix/guixsd-install-@value{VERSION}.@var{system}.iso.xz},
 where @var{system} is one of:
 
 @table @code
@@ -7871,8 +7871,8 @@ Make sure to download the associated @file{.sig} file and to verify the
 authenticity of the image against it, along these lines:
 
 @example
-$ wget ftp://alpha.gnu.org/gnu/guix/guixsd-install-@value{VERSION}.@var{system}.xz.sig
-$ gpg --verify guixsd-install-@value{VERSION}.@var{system}.xz.sig
+$ wget ftp://alpha.gnu.org/gnu/guix/guixsd-install-@value{VERSION}.@var{system}.iso.xz.sig
+$ gpg --verify guixsd-install-@value{VERSION}.@var{system}.iso.xz.sig
 @end example
 
 If that command fails because you do not have the required public key,
@@ -7898,7 +7898,7 @@ To copy the image to a USB stick, follow these steps:
 Decompress the image using the @command{xz} command:
 
 @example
-xz -d guixsd-install-@value{VERSION}.@var{system}.xz
+xz -d guixsd-install-@value{VERSION}.@var{system}.iso.xz
 @end example
 
 @item
@@ -7907,7 +7907,7 @@ its device name.  Assuming that the USB stick is known as @file{/dev/sdX},
 copy the image with:
 
 @example
-dd if=guixsd-install-@value{VERSION}.x86_64-linux of=/dev/sdX
+dd if=guixsd-install-@value{VERSION}.x86_64-linux.iso of=/dev/sdX
 sync
 @end example
 
@@ -7923,7 +7923,7 @@ To copy the image to a DVD, follow these steps:
 Decompress the image using the @command{xz} command:
 
 @example
-xz -d guixsd-install-@value{VERSION}.@var{system}.xz
+xz -d guixsd-install-@value{VERSION}.@var{system}.iso.xz
 @end example
 
 @item
@@ -7932,7 +7932,7 @@ its device name.  Assuming that the DVD drive is known as @file{/dev/srX},
 copy the image with:
 
 @example
-growisofs -dvd-compat -Z /dev/srX=guixsd-install-@value{VERSION}.x86_64
+growisofs -dvd-compat -Z /dev/srX=guixsd-install-@value{VERSION}.x86_64.iso
 @end example
 
 Access to @file{/dev/srX} usually requires root privileges.
@@ -8317,7 +8317,7 @@ Boot the USB installation image in an VM:
 @example
 qemu-system-x86_64 -m 1024 -smp 1 \
   -net user -net nic,model=virtio -boot menu=on \
-  -drive file=guixsd-install-@value{VERSION}.@var{system} \
+  -drive file=guixsd-install-@value{VERSION}.@var{system}.iso \
   -drive file=guixsd.img
 @end example