diff --git a/CHANGELOG.md b/CHANGELOG.md
index eb14f25..77ca1a2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -33,7 +33,7 @@ Releases: GitHub creates the tag and a release with the notes; the ISO itself (o
 
 **Features:**
 
-* **ISO:** named after its release tag (`steamify-cachyos-2.9.3-2026.09.29-2230-x86_64.iso`; built by hand, the date), labelled after the Steamify version on it and the build time (`STEAMIFY_2_9_1_20260929_1432`, was CachyOS's `COS_<year><month>`); CachyOS Hello installs it like CachyOS's own
+* **ISO:** named after its release tag (`steamify-cachyos-2.9.3-2026.09.29-2030-x86_64.iso`; built by hand, without a tag: `local`), labelled after the Steamify version on it and the build time (`STEAMIFY_2_9_1_20260929_1432`, was CachyOS's `COS_<year><month>`); CachyOS Hello installs it like CachyOS's own
   release (the ISO's own release, its tag without the v, is in `/etc/steammachine-iso-build` and the boot menu)
 * **Installer (CachyOS - Steamify Installer):**
   * A Steamify page after the packages page: which Steam Machine parts to set up (rows from
diff --git a/archiso/profiledef.sh b/archiso/profiledef.sh
index d4fb74f..5baa27c 100644
--- a/archiso/profiledef.sh
+++ b/archiso/profiledef.sh
@@ -2,20 +2,19 @@
 # shellcheck disable=SC2034
 
 iso_name="steamify-cachyos"
-# The label follows the release name: the Steamify version on the ISO (steamify-prepare.sh put it there)
-# plus the build date and time, e.g. STEAMIFY_2_9_1_20260929_1432 (ISO 9660: at most 32 characters,
-# A-Z 0-9 _). STEAMIFY_BUILD_STAMP (YYYYMMDD_HHMM, UTC) from the release workflow, so both name the same
-# moment; built by hand, the time now (UTC).
+# The label follows the release tag, which GitHub names (iso-release.yml): the Steamify version on the ISO
+# (steamify-prepare.sh put it there) plus the tag's date and time, e.g. STEAMIFY_2_9_3_20260929_2030 (ISO 9660:
+# at most 32 characters, A-Z 0-9 _). STEAMIFY_BUILD_STAMP (YYYYMMDD_HHMM, UTC) comes from the tag; the build
+# reads no clock of its own. Built by hand, without a tag: LOCAL.
 _steamify="$(sed -n 's/^VERSION=//p' "${BASH_SOURCE[0]%/*}/airootfs/usr/local/share/steamify/steamify.sh" 2>/dev/null | head -n 1)"
-_stamp="${STEAMIFY_BUILD_STAMP:-$(date -u --date="@${SOURCE_DATE_EPOCH:-$(date +%s)}" +%Y%m%d_%H%M)}"
+_stamp="${STEAMIFY_BUILD_STAMP:-LOCAL}"
 iso_label="STEAMIFY_${_steamify:+${_steamify//./_}_}${_stamp}"
 iso_label="${iso_label:0:32}"
 iso_publisher="CachyOS <https://cachyos.org>"
 iso_application="Steamify CachyOS Live (based on CachyOS)"
-# The file name (<iso_name>-<iso_version>-x86_64.iso) follows the release tag without its v
-# (STEAMIFY_ISO_VERSION from the release workflow: steamify-cachyos-2.9.3-dev.2026.09.29-2230-x86_64.iso);
-# built by hand, the date.
-iso_version="${STEAMIFY_ISO_VERSION:-$(date --date="@${SOURCE_DATE_EPOCH:-$(date +%s)}" +%Y.%m.%d)}"
+# The file name (<iso_name>-<iso_version>-x86_64.iso) is the release tag without its v (STEAMIFY_ISO_VERSION
+# from the tag: steamify-cachyos-2.9.3-dev.2026.09.29-2030-x86_64.iso). Built by hand, without a tag: local.
+iso_version="${STEAMIFY_ISO_VERSION:-local}"
 install_dir="arch"
 buildmodes=('iso')
 ## GRUB
diff --git a/util-iso.sh b/util-iso.sh
index 3b32b74..4f6792c 100755
--- a/util-iso.sh
+++ b/util-iso.sh
@@ -141,8 +141,9 @@ prepare_profile(){
     info "Profile: [%s]" "${profile}"
 
     # The release tag without its v when the release workflow builds (STEAMIFY_ISO_VERSION): the boot menu
-    # and /etc/steammachine-iso-build name the same release as the file, label and tag. By hand: the date.
-    local _iso_version="${STEAMIFY_ISO_VERSION:-$(date +%y%m%d)}"
+    # and /etc/steammachine-iso-build name the same release as the file, label and tag (no clock of its own).
+    # By hand, without a tag: local.
+    local _iso_version="${STEAMIFY_ISO_VERSION:-local}"
     change_grub_version "${_iso_version}"
 
     # Fetch up-to-date version of CachyOS repo mirrorlist