#1143308 fonts-nunito: FTBFS: dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2

#1143308#5
Date:
2026-08-01 22:35:36 UTC
From:
To:
Dear maintainer:

During a rebuild of all packages in unstable, this package failed to build.

Below you will find the last part of the build log (probably the most
relevant part, but not necessarily). If required, the full build log
is available here:

https://people.debian.org/~sanvila/build-logs/202608/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you cannot reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:fonts-nunito, so that this is still
visible in the BTS web page for this package.

Thanks.
--------------------------------------------------------------------------------
[...]
 debian/rules clean
dh clean
   dh_clean
 debian/rules binary
dh binary
   dh_update_autotools_config
   dh_autoreconf
   debian/rules override_dh_auto_build
make[1]: Entering directory '/<<PKGBUILDDIR>>'
cd sources && gftools builder config.yaml
INFO:glyphsLib.parser:Parsing .glyphs file
INFO:glyphsLib.parser:Parsing .glyphs file
[1/136] instantiateUfo
FAILED: [code=1] instance_ufos/Nunito-ExtraLight.ufo.json
/usr/bin/python3 -m gftools.builder.jobrunner fontmake -i "Nunito ExtraLight" -o ufo -g Nunito.glyphs --ufo-structure=json --instance-dir instance_ufos

Command failed:
fontmake -i Nunito ExtraLight -o ufo -g Nunito.glyphs --ufo-structure=json --instance-dir instance_ufos

INFO:fontmake.font_project:Building master UFOs and designspace from Glyphs source
INFO:glyphsLib.parser:Parsing .glyphs file
INFO:glyphsLib.builder:Running 'align_alternate_layers' transformation
INFO:glyphsLib.builder:Running 'propagate_all_anchors' transformation
INFO:fontmake.font_project:Loading 6 DesignSpace source UFOs
INFO:fontmake.font_project:Interpolating master UFOs from designspace
INFO:fontmake.font_project:Generating instance UFO for 'Nunito ExtraLight'
INFO:fontmake.font_project:Saving instance_ufos/Nunito-ExtraLight.ufo.json
fontmake: Error: In 'Nunito.glyphs' -> 'master_ufo/Nunito.designspace' -> 'instance_ufos/Nunito-ExtraLight.ufo.json': Writing UFO source failed: Extras not installed: ufoLib2[json]

[2/136] instantiateUfo
FAILED: [code=1] instance_ufos/Nunito-Light.ufo.json
/usr/bin/python3 -m gftools.builder.jobrunner fontmake -i "Nunito Light" -o ufo -g Nunito.glyphs --ufo-structure=json --instance-dir instance_ufos

Command failed:
fontmake -i Nunito Light -o ufo -g Nunito.glyphs --ufo-structure=json --instance-dir instance_ufos

INFO:fontmake.font_project:Building master UFOs and designspace from Glyphs source
INFO:glyphsLib.parser:Parsing .glyphs file
INFO:glyphsLib.builder:Running 'align_alternate_layers' transformation
INFO:glyphsLib.builder:Running 'propagate_all_anchors' transformation
INFO:fontmake.font_project:Loading 6 DesignSpace source UFOs
INFO:fontmake.font_project:Interpolating master UFOs from designspace
INFO:fontmake.font_project:Generating instance UFO for 'Nunito Light'
INFO:fontmake.font_project:Saving instance_ufos/Nunito-Light.ufo.json
fontmake: Error: In 'Nunito.glyphs' -> 'master_ufo/Nunito.designspace' -> 'instance_ufos/Nunito-Light.ufo.json': Writing UFO source failed: Extras not installed: ufoLib2[json]

[3/136] buildVariable
fontmake --output-path /tmp/tmp3_rgd_k1 -o variable -g Nunito.glyphs --filter ... --filter FlattenComponentsFilter --filter DecomposeTransformedComponentsFilter
ninja: build stopped: subcommand failed.
make[1]: *** [debian/rules:7: override_dh_auto_build] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:4: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
--------------------------------------------------------------------------------

#1143308#10
Date:
2026-08-04 14:52:45 UTC
From:
To:
We believe that the bug you reported is fixed in the latest version of
fonts-nunito, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1143308@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Bastian Germann <bage@debian.org> (supplier of updated fonts-nunito package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Tue, 04 Aug 2026 16:21:14 +0200
Source: fonts-nunito
Architecture: source
Version: 0.0~git20250226.8c6a9bb-2
Distribution: unstable
Urgency: medium
Maintainer: Debian Fonts Team <debian-fonts@lists.debian.org>
Changed-By: Bastian Germann <bage@debian.org>
Closes: 1143308
Changes:
 fonts-nunito (0.0~git20250226.8c6a9bb-2) unstable; urgency=medium
 .
   * Team upload
   * Clean most of the build output
   * Add Build-Depends to fulfill ufoLib2[json] feature (Closes: #1143308)
Checksums-Sha1:
 aae96c4df233fe6b49cec32b9e03fb2078e0df59 1981 fonts-nunito_0.0~git20250226.8c6a9bb-2.dsc
 aef84d10b2c91e5253cd6506d530100ce1f06680 4152 fonts-nunito_0.0~git20250226.8c6a9bb-2.debian.tar.xz
 87b0b481a22df7d348623bbd54ee0dcf82bb8118 10570 fonts-nunito_0.0~git20250226.8c6a9bb-2_source.buildinfo
Checksums-Sha256:
 8b8294e6485b0df53bab19610e7d7f98b025d98fda62fd51404cd5e878c73e91 1981 fonts-nunito_0.0~git20250226.8c6a9bb-2.dsc
 0d635eec5de37908ee6f3559dab8487f5e771cd8e3737afe1380f65b4a5c4965 4152 fonts-nunito_0.0~git20250226.8c6a9bb-2.debian.tar.xz
 8826c7255545a443b285d7a98e5e24746826314531d5cac392967e6872aa48c9 10570 fonts-nunito_0.0~git20250226.8c6a9bb-2_source.buildinfo
Files:
 7b2718a2848c156f097f7f7877ab7c5f 1981 fonts optional fonts-nunito_0.0~git20250226.8c6a9bb-2.dsc
 841182d5471c00cbe338df0562b0859e 4152 fonts optional fonts-nunito_0.0~git20250226.8c6a9bb-2.debian.tar.xz
 34eec235c3762fa2ff5f2459d3974279 10570 fonts optional fonts-nunito_0.0~git20250226.8c6a9bb-2_source.buildinfo
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