Failure to build windowmaker

[Riccardo Mottola <riccardo.mottola%libero.it@localhost>]

Hi,

I am updating pkgs using pkg_rolling-replace (and then reissuing make 
replace) and windowmaker fails consistently with:

checking for Magick support library... Package MagickWand was not found 
in the pkg-config search path.
Perhaps you should add the directory containing `MagickWand.pc'
to the PKG_CONFIG_PATH environment variable
Package 'MagickWand', required by 'virtual:world', not found
Package MagickWand was not found in the pkg-config search path.
Perhaps you should add the directory containing `MagickWand.pc'
to the PKG_CONFIG_PATH environment variable
Package 'MagickWand', required by 'virtual:world', not found
Package MagickWand was not found in the pkg-config search path.
Perhaps you should add the directory containing `MagickWand.pc'
to the PKG_CONFIG_PATH environment variable
Package 'MagickWand', required by 'virtual:world', not found
Package MagickWand was not found in the pkg-config search path.
Perhaps you should add the directory containing `MagickWand.pc'
to the PKG_CONFIG_PATH environment variable
Package 'MagickWand', required by 'virtual:world', not found
Package MagickWand was not found in the pkg-config search path.
Perhaps you should add the directory containing `MagickWand.pc'
to the PKG_CONFIG_PATH environment variable
Package 'MagickWand', required by 'virtual:world', not found
Package MagickWand was not found in the pkg-config search path.
Perhaps you should add the directory containing `MagickWand.pc'
to the PKG_CONFIG_PATH environment variable
Package 'MagickWand', required by 'virtual:world', not found
configure: error: MagickWand was found but the library does not link
*** Error code 1


I have ImageMagick and pkfconf installed and both are updated and 
reinstalled:
pkgconf-1.0.1       API-driven pkg-config replacement
ImageMagick-7.0.5.4 Package for display and interactive manipulation of 
images


What's going wrong? A  pkgconf bug?

Riccardo