Build fails with missing libubox20260213 / libblobmsg-json20260213 on 25.12.0
Describe the bug
When requesting a custom image build for OpenWrt 25.12.0, the build fails because block-mount and mtd reference libubox20260213 and libblobmsg-json20260213, which are not available in the release build environment.
The build server appears to pull snapshot/trunk versions of block-mount (2026.02.15~8d377aa6-r1) and mtd (mtd-27) which depend on a newer ABI version of libubox that does not exist in the 25.12.0 release package index.
This bug affects two independent entry points that both use the same ASU backend:
luci-app-attendedsysupgrade – the ASU client built into the OpenWrt firmware (tested when upgrading from 24.10.5 to 25.12.0)firmware-selector.openwrt.org – the web-based firmware selector (tested with a manual custom package list for 25.12.0)
Both produce the exact same error, confirming the issue is on the server side, not in the client.
To Reproduce
via firmware-selector.openwrt.org:
- Go to https://firmware-selector.openwrt.org
- Select device:
Linksys WRT1200AC (target: mvebu/cortexa9)
- Select version:
25.12.0
- Add any custom packages that include
block-mount or mtd
- Request build → build fails
via luci-app-attendedsysupgrade:
- Run OpenWrt 24.10.5 on the same device
- Open LuCI → System → Attended Sysupgrade
- Request upgrade to 25.12.0 with existing package list
- Build fails with the same error
Error message
ERROR: unable to select packages:
libblobmsg-json20260213 (no such package):
required by: block-mount-2026.02.15~8d377aa6-r1[libblobmsg-json20260213]
libubox20260213 (no such package):
required by: block-mount-2026.02.15~8d377aa6-r1[libubox20260213]
mtd-27[libubox20260213]
Expected behavior
The build server should use the release versions of block-mount and mtd that match the 25.12.0 release package index, not snapshot/trunk versions with newer ABI dependencies.
Environment
- Device: Linksys WRT1200AC
- Target:
mvebu/cortexa9
- Requested version:
25.12.0
- Client:
luci-app-attendedsysupgrade (v26.005.68630~af8a35c) AND firmware-selector.openwrt.org
- ASU server: https://sysupgrade.openwrt.org
Build fails with missing libubox20260213 / libblobmsg-json20260213 on 25.12.0
Describe the bug
When requesting a custom image build for OpenWrt 25.12.0, the build fails because
block-mountandmtdreferencelibubox20260213andlibblobmsg-json20260213, which are not available in the release build environment.The build server appears to pull snapshot/trunk versions of
block-mount(2026.02.15~8d377aa6-r1) andmtd(mtd-27) which depend on a newer ABI version of libubox that does not exist in the 25.12.0 release package index.This bug affects two independent entry points that both use the same ASU backend:
luci-app-attendedsysupgrade– the ASU client built into the OpenWrt firmware (tested when upgrading from 24.10.5 to 25.12.0)firmware-selector.openwrt.org– the web-based firmware selector (tested with a manual custom package list for 25.12.0)Both produce the exact same error, confirming the issue is on the server side, not in the client.
To Reproduce
via firmware-selector.openwrt.org:
Linksys WRT1200AC(target:mvebu/cortexa9)25.12.0block-mountormtdvia luci-app-attendedsysupgrade:
Error message
Expected behavior
The build server should use the release versions of
block-mountandmtdthat match the 25.12.0 release package index, not snapshot/trunk versions with newer ABI dependencies.Environment
mvebu/cortexa925.12.0luci-app-attendedsysupgrade(v26.005.68630~af8a35c) AND firmware-selector.openwrt.org