I have encountered this issue in "wasix-libc" package, where "uscan --download-current-version" failed to match upstream version "2025.12.24.1" despite having that very release listed among Github tags:
```
$ uscan --destdir=.. --repack --download-current-version -v
uscan info: Scan watch files in .
uscan info: Check debian/watch and debian/changelog in .
uscan info: package="wasix-libc" version="2025.12.24.1+ds-1" (as seen in
debian/changelog)
uscan info: package="wasix-libc" version="2025.12.24.1+ds" (no epoch/
revision)
uscan info: ./debian/changelog sets package="wasix-libc"
version="2025.12.24.1+ds"
uscan info: Process watch file at: debian/watch
package = wasix-libc
version = 2025.12.24.1+ds
pkg_dir = .
uscan info: debian/watch isn't formatted in version 5, trying version 4
uscan info: File debian/watch converted into << ==EOF==
Version: 5
# https://salsa.debian.org/snippets/95
# https://wiki.debian.org/debian/watch
# uscan(1) configuration file.
Source: https://api.github.com/repos/wasix-org/wasix-libc/releases?
per_page=99
Matching-Pattern: https://api.github.com/repos/[^/]+/[^/]+/tarball/v?
([\d.\-]+)
Compression: xz
Dversionmangle: s{[+~](dfsg|ds)\d*}{}
Filenamemangle: s%v?@ANY_VERSION@%@PACKAGE@-$1.tar.xz%
Pgpmode: none
Repack: yes
Repacksuffix: +ds
Searchmode: plain
Update-Script: uupdate
Uversionmangle: s{[\-]}{.}g
==EOF==
uscan info: Reset watch_version to 4 because default value may change in
version 5
uscan info: Parsing compression: xz
uscan info: Parsing dversionmangle: s{[+~](dfsg|ds)\d*}{}
uscan info: Parsing filenamemangle: s%v?(?:[-_]?[Vv]?(\d[\-+\.:\~\da-zA-
Z]*))%wasix-libc-$1.tar.xz%
uscan info: Parsing pgpmode: none
uscan info: Parsing repack: yes
uscan info: Parsing repacksuffix: +ds
uscan info: Parsing searchmode: plain
uscan info: Parsing uversionmangle: s{[\-]}{.}g
uscan info: Last orig.tar.* tarball version (from debian/changelog):
2025.12.24.1+ds
uscan info: Download the --download-current-version specified version:
2025.12.24.1
uscan info: Requesting URL:
https://api.github.com/repos/wasix-org/wasix-libc/releases?
per_page=99
uscan info: Found the following matching files on the web page (newest
first):
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2025-12-24.1 (2025.12.24.1) index=2025.12.24.1-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2025-12-22.1 (2025.12.22.1) index=2025.12.22.1-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2025-12-10.1 (2025.12.10.1) index=2025.12.10.1-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2025-11-06.1 (2025.11.06.1) index=2025.11.06.1-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2025-09-02.1 (2025.09.02.1) index=2025.09.02.1-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2025-08-14.1 (2025.08.14.1) index=2025.08.14.1-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2025-07-15.2 (2025.07.15.2) index=2025.07.15.2-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2025-07-07.1 (2025.07.07.1) index=2025.07.07.1-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2025-06-12.1 (2025.06.12.1) index=2025.06.12.1-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2025-06-11.1 (2025.06.11.1) index=2025.06.11.1-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2024-07-08.1 (2024.07.08.1) index=2024.07.08.1-0
https://api.github.com/repos/wasix-org/wasix-libc/tarball/
v2024-06-20.1 (2024.06.20.1) index=2024.06.20.1-0
uscan warn: In debian/watch no matching files for version 2025.12.24.1
in watch line
uscan info: Scan finished
```
It is a regression, because when I downgraded "devscripts" from
(2.25.22~bpo13+1) to (2.25.15+deb13u1), "uscan" was able to obtain
upstream source without any issues.
I have tried proposed patch (by Uwe Kleine-König) and I confirm
that it fixes the problem, however I did not attempt any regression
testing with other packages.
--
Cheers,
Dmitry Smirnov
GPG key : 4096R/52B6BBD953968D1B
---
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