Error building the firmware image

Server response: Error: Impossible package selection ....
Request Data:
{
"url": "https://sysupgrade.openwrt.org",
"revision": "r25451-1a69543376",
"advanced_mode": "0",
"sha256_unsigned": "f98b5b89375902e9f9847fddf3c205140c9dd760500a391966d0b847c3e0b88c",
"branch": "SNAPSHOT",
"efi": null,
"request_hash": "b8341c5fbbaf6f9dbbc8d3a3b62fdb22",
"profile": "netgear,r7800",
"target": "ipq806x/generic",
"version": "SNAPSHOT",
"packages": [
"0",
"1",
"10",
"11",
"12",
"13",
"14",
"15",
"16",
"17",
"18",
"19",
"2",
"20",
"21",
"22",
"23",
"24",
"25",
"26",
"27",
"28",
"29",
"3",
"30",
"31",
"32",
"33",
"34",
"35",
"36",
"37",
"38",
"39",
"4",
"40",
"41",
"42",
"43",
"44",
"45",
"46",
"47",
"48",
"49",
"5",
"50",
"51",
"52",
"53",
"54",
"55",
"56",
"57",
"58",
"59",
"6",
"60",
"61",
"62",
"63",
"64",
"65",
"66",
"7",
"8",
"9"
],
"diff_packages": true,
"filesystem": "squashfs",
"client": "luci/git-24.036.32731-cb45737"
}
STDERR:
Generate local signing keys...
Generate local certificate...
Package list missing or not up-to-date, generating it.

Building package index...
Downloading https://downloads.openwrt.org/snapshots/targets/ipq806x/generic/packages/Packages.gz
Updated list of available packages in /builder/build_dir/target-arm_cortex-a15+neon-vfpv4_musl_eabi/root-ipq806x/../../../../builder/dl/openwrt_core
Downloading https://downloads.openwrt.org/snapshots/targets/ipq806x/generic/packages/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/base/Packages.gz
Updated list of available packages in /builder/build_dir/target-arm_cortex-a15+neon-vfpv4_musl_eabi/root-ipq806x/../../../../builder/dl/openwrt_base
Downloading https://downloads.openwrt.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/base/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/snapshots/targets/ipq806x/generic/kmods/6.1.82-1-0267fd1d1e613108eb1299ae3ae7f5ca/Packages.gz
Updated list of available packages in /builder/build_dir/target-arm_cortex-a15+neon-vfpv4_musl_eabi/root-ipq806x/../../../../builder/dl/openwrt_kmods
Downloading https://downloads.openwrt.org/snapshots/targets/ipq806x/generic/kmods/6.1.82-1-0267fd1d1e613108eb1299ae3ae7f5ca/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/luci/Packages.gz
Updated list of available packages in /builder/build_dir/target-arm_cortex-a15+neon-vfpv4_musl_eabi/root-ipq806x/../../../../builder/dl/openwrt_luci
Downloading https://downloads.openwrt.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/luci/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/packages/Packages.gz
Updated list of available packages in /builder/build_dir/target-arm_cortex-a15+neon-vfpv4_musl_eabi/root-ipq806x/../../../../builder/dl/openwrt_packages
Downloading https://downloads.openwrt.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/packages/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/routing/Packages.gz
Updated list of available packages in /builder/build_dir/target-arm_cortex-a15+neon-vfpv4_musl_eabi/root-ipq806x/../../../../builder/dl/openwrt_routing
Downloading https://downloads.openwrt.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/routing/Packages.sig
Signature check passed.
Downloading https://downloads.openwrt.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/telephony/Packages.gz
Updated list of available packages in /builder/build_dir/target-arm_cortex-a15+neon-vfpv4_musl_eabi/root-ipq806x/../../../../builder/dl/openwrt_telephony
Downloading https://downloads.openwrt.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/telephony/Packages.sig
Signature check passed.
Downloading file:packages/Packages
Updated list of available packages in /builder/build_dir/target-arm_cortex-a15+neon-vfpv4_musl_eabi/root-ipq806x/../../../../builder/dl/imagebuilder
Downloading file:packages/Packages.sig
Signature check passed.
Collected errors:

• opkg_install_cmd: Cannot install package 0.
• opkg_install_cmd: Cannot install package 1.
• opkg_install_cmd: Cannot install package 10.
• opkg_install_cmd: Cannot install package 11.
• opkg_install_cmd: Cannot install package 12.
• opkg_install_cmd: Cannot install package 13.
• opkg_install_cmd: Cannot install package 14.
• opkg_install_cmd: Cannot install package 15.
• opkg_install_cmd: Cannot install package 16.
• opkg_install_cmd: Cannot install package 17.
• opkg_install_cmd: Cannot install package 18.
• opkg_install_cmd: Cannot install package 19.
• opkg_install_cmd: Cannot install package 2.
• opkg_install_cmd: Cannot install package 20.
• opkg_install_cmd: Cannot install package 21.
• opkg_install_cmd: Cannot install package 22.
• opkg_install_cmd: Cannot install package 23.
• opkg_install_cmd: Cannot install package 24.
• opkg_install_cmd: Cannot install package 25.
• opkg_install_cmd: Cannot install package 26.
• opkg_install_cmd: Cannot install package 27.
• opkg_install_cmd: Cannot install package 28.
• opkg_install_cmd: Cannot install package 29.
• opkg_install_cmd: Cannot install package 3.
• opkg_install_cmd: Cannot install package 30.
• opkg_install_cmd: Cannot install package 31.
• opkg_install_cmd: Cannot install package 32.
• opkg_install_cmd: Cannot install package 33.
• opkg_install_cmd: Cannot install package 34.
• opkg_install_cmd: Cannot install package 35.
• opkg_install_cmd: Cannot install package 36.
• opkg_install_cmd: Cannot install package 37.
• opkg_install_cmd: Cannot install package 38.
• opkg_install_cmd: Cannot install package 39.
• opkg_install_cmd: Cannot install package 4.
• opkg_install_cmd: Cannot install package 40.
• opkg_install_cmd: Cannot install package 41.
• opkg_install_cmd: Cannot install package 42.
• opkg_install_cmd: Cannot install package 43.
• opkg_install_cmd: Cannot install package 44.
• opkg_install_cmd: Cannot install package 45.
• opkg_install_cmd: Cannot install package 46.
• opkg_install_cmd: Cannot install package 47.
• opkg_install_cmd: Cannot install package 48.
• opkg_install_cmd: Cannot install package 49.
• opkg_install_cmd: Cannot install package 5.
• opkg_install_cmd: Cannot install package 50.
• opkg_install_cmd: Cannot install package 51.
• opkg_install_cmd: Cannot install package 52.
• opkg_install_cmd: Cannot install package 53.
• opkg_install_cmd: Cannot install package 54.
• opkg_install_cmd: Cannot install package 55.
• opkg_install_cmd: Cannot install package 56.
• opkg_install_cmd: Cannot install package 57.
• opkg_install_cmd: Cannot install package 58.
• opkg_install_cmd: Cannot install package 59.
• opkg_install_cmd: Cannot install package 6.
• opkg_install_cmd: Cannot install package 60.
• opkg_install_cmd: Cannot install package 61.
• opkg_install_cmd: Cannot install package 62.
• opkg_install_cmd: Cannot install package 63.
• opkg_install_cmd: Cannot install package 64.
• opkg_install_cmd: Cannot install package 65.
• opkg_install_cmd: Cannot install package 66.
• opkg_install_cmd: Cannot install package 7.
• opkg_install_cmd: Cannot install package 8.
• opkg_install_cmd: Cannot install package 9.
  make[2]: *** [Makefile:189: package_install] Error 255
  make[1]: *** [Makefile:154: _call_manifest] Error 2
  make: *** [Makefile:274: manifest] Error 2

Start with the reported request for profile netgear,r7800 on target ipq806x/generic and trace the imagebuilder failure through Makefile:189, Makefile:154, and Makefile:274. Check how the package list containing numeric entries is passed to package_install and reproduce the SNAPSHOT build. Done means the firmware image builds successfully without the opkg package-install errors.