SELinux userspace build fails on Fedora 44

SELinux userspace build fails on Fedora 44

[Kalevi Kolttonen]

Hello!

The instructions in README.md no longer work when
building SELinux userspace on Fedora 44. It has
something to do Python 3 as the error is:

python3 -m build --no-isolation --wheel .
/usr/sbin/python3: No module named build
make[2]: *** [Makefile:17: python-build] Error 1

Fedora 44 has:

Name        : python3
Version     : 3.14.5
Release     : 1.fc44

How we do fix this?

br,
KK

Re: SELinux userspace build fails on Fedora 44

[Kalevi Kolttonen]

On Wed, Jun 10, 2026 at 06:50:23PM +0300, Kalevi Kolttonen wrote:
> python3 -m build --no-isolation --wheel .
> /usr/sbin/python3: No module named build
> make[2]: *** [Makefile:17: python-build] Error 1
> 
> Fedora 44 has:
> 
> Name        : python3
> Version     : 3.14.5
> Release     : 1.fc44
> 
> How we do fix this?

Aargh, it should have been obvious! I just needed
python3-build package like it says in README.md.

I wonder how it worked before...

br,
KK

Re: SELinux userspace build fails on Fedora 44

[Petr Lautrbach]

Kalevi Kolttonen <kalevi@kolttonen.fi> writes:

> Hello!
>
> The instructions in README.md no longer work when
> building SELinux userspace on Fedora 44. It has
> something to do Python 3 as the error is:
>
> python3 -m build --no-isolation --wheel .
> /usr/sbin/python3: No module named build
> make[2]: *** [Makefile:17: python-build] Error 1
>
> Fedora 44 has:
>
> Name        : python3
> Version     : 3.14.5
> Release     : 1.fc44
>

Works for me:

$ rpm -q python3      
python3-3.14.5-1.fc44.x86_64

$ make DESTDIR=/home/plautrba/sw/selinux install install-pywrap

$ find /home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux/_selinux.cpython-314-x86_64-linux-gnu.so
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux/audit2why.cpython-314-x86_64-linux-gnu.so
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux/__init__.py
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux-3.11rc1.dist-info
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux-3.11rc1.dist-info/METADATA
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux-3.11rc1.dist-info/WHEEL
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux-3.11rc1.dist-info/top_level.txt
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux-3.11rc1.dist-info/INSTALLER
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux-3.11rc1.dist-info/direct_url.json
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux-3.11rc1.dist-info/REQUESTED
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/selinux-3.11rc1.dist-info/RECORD
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/_selinux.cpython-314-x86_64-linux-gnu.so
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/_semanage.cpython-314-x86_64-linux-gnu.so
/home/plautrba/sw/selinux/usr/lib64/python3.14/site-packages/semanage.py


> How we do fix this?
>

See the commit e11e59675f69:

Author: Petr Lautrbach <lautrbach@redhat.com>
Date:   Fri Jun 5 13:25:27 2026 +0200

    libselinux,python: Use system Python3 build module
...
--- a/README.md
+++ b/README.md
@@ -64,6 +64,7 @@ dnf install \
 
 # For Python and Ruby bindings
 dnf install \
+    python3-build \
     python3-devel \
     python3-pip \
     python3-setuptools \
@@ -97,6 +98,7 @@ apt-get install --no-install-recommends --no-install-suggests \
 
 # For Python and Ruby bindings
 apt-get install --no-install-recommends --no-install-suggests \
+    python3-build \
     python3-dev \
     python3-pip \
     python3-setuptools \

Petr

Re: SELinux userspace build fails on Fedora 44

[Kalevi Kolttonen]

On Wed, Jun 10, 2026 at 06:21:16PM +0200, Petr Lautrbach wrote:
> Works for me:

Yes, I was foolish, the error message was quite
clear. I got confused because it used to work earlier
and I thought I had all the dependencies installed.

I just saw the git logs about the Makefile and realized
this changed recently. Sorry for the useless noise, it
works fine for me too.

br,
KK