Unable to build git-annex

[Gleb Popov]

When building recent version of git-annex I get:

[33 of 34] Compiling Build.DesktopFile (
/usr/local/poudriere/ports/git/devel/hs-git-annex/work/git-annex-7.20181211/Build/DesktopFile.hs,
/usr/local/poudriere/ports/git/devel/hs-git-annex/work/git-annex-7.20181211/dist-newstyle/build/x86_64-freebsd/ghc-8.6.3/git-annex-7.20181211/setup/Build/DesktopFile.o
)
[34 of 34] Compiling Main             (
/usr/local/poudriere/ports/git/devel/hs-git-annex/work/git-annex-7.20181211/dist-newstyle/build/x86_64-freebsd/ghc-8.6.3/git-annex-7.20181211/setup/setup.hs,
/usr/local/poudriere/ports/git/devel/hs-git-annex/work/git-annex-7.20181211/dist-newstyle/build/x86_64-freebsd/ghc-8.6.3/git-annex-7.20181211/setup/Main.o
)
Linking
/usr/local/poudriere/ports/git/devel/hs-git-annex/work/git-annex-7.20181211/dist-newstyle/build/x86_64-freebsd/ghc-8.6.3/git-annex-7.20181211/setup/setup
...
  checking UPGRADE_LOCATION... not available
  checking git... yes
  checking git version... 2.20.1
  checking cp -a... yes
  checking cp -p... yes
  checking cp --preserve=timestamps... no
  checking cp --reflink=auto... no
  checking xargs -0... yes
  checking rsync... yes
  checking curl... yes
  checking bup... no
  checking nice... yes
  checking ionice... no
  checking nocache... no
  checking gpg... gpg
  checking lsof... not available
  checking git-remote-gcrypt... not available
  checking ssh connection caching... yes
Configuring git-annex-7.20181211...
setup: Missing dependency on a foreign library:
* Missing (or bad) header file: Utility/libkqueue.h

There is indeed no Utility/libkqueue.h file. Can you check on your side if
is present?