The problem was solved by copying the configure command line parameters (--prefix=/usr...
Here is the log. Can't see libsipe mentioned.
I made the PKGBUILD use git-build.sh instead of configure stuff. The pakcage was...
I made Arch PKGBUILD to use https://github.com/xhaakon/sipe/archive/7ac053271f74f3c3d3b2d2d01dccda13237b344b.zip...
Yes, it's 1.19.0.
Here you are.
Unfortunately pidgin-sipe 1.19.0-1 doesn't help with the problem.
Here are bit obfuscated fragments of the log files.