Hi, building the Claws GTK3 port works, if I build from the branch like this: [rocketmouse@archlinux tmp]$ git clone git://git.claws-mail.org/claws.git [snip] [rocketmouse@archlinux tmp]$ cd claws [rocketmouse@archlinux claws]$ git fetch origin [rocketmouse@archlinux claws]$ git branch --track gtk3 origin/gtk3 Branch 'gtk3' set up to track remote branch 'gtk3' from 'origin'. [rocketmouse@archlinux claws]$ ./autogen.sh [snip] [rocketmouse@archlinux claws]$ ./configure --build=$HOSTTYPE-arch-linux-gnu --prefix=/usr --disable-static --enable-enchant --enable-gnutls --enable-ldap --enable-crash-dialog --enable-pgpmime-plugin --enable-spamassassin-plugin --enable-bogofilter-plugin [rocketmouse@archlinux claws]$ sh version 3.17.0-153-gf4607b [rocketmouse@archlinux claws]$ make [snip] Done. [snip] If I try to build from the master with "--enable-gtk3" it fails, see: https://lists.claws-mail.org/pipermail/users/2018-November/023174.html A developer mentions that I should build from the gtk3 branch: https://lists.claws-mail.org/pipermail/users/2018-November/023176.html I commented out "#--enable-gtk3"... [rocketmouse@archlinux claws]$ grep HOST /usr/src/claws-mail-gtk3-git/PKGBUILD -B1 -A14 ./configure \ --build=$HOSTTYPE-arch-linux-gnu \ --prefix=/usr \ --disable-jpilot \ --disable-maintainer-mode \ --disable-manual \ --disable-static \ --enable-bogofilter-plugin \ --enable-crash-dialog \ --enable-enchant \ --enable-gnutls \ #--enable-gtk3 \ --enable-ldap \ --enable-pgpmime-plugin \ --enable-silent-rules \ --enable-spamassassin-plugin ...but don't know what "foo bar" to add to the source or how else to handle this by a PKGBUILD: [rocketmouse@archlinux claws]$ grep source /usr/src/claws-mail-gtk3-git/PKGBUILD source=('claws-mail::git://git.claws-mail.org/#FOO=BAR') Is there an easy way to do it? Regards, Ralf