"pkg-config" not available in 2018Q3

In 2018Q2:

# pkgin search pkg-config
verifypc-1.7         Sanity check package dependencies according to pkg-config
ruby25-pkg-config-1.3.1  Pure Ruby implementation of pkg-config
ruby24-pkg-config-1.3.1  Pure Ruby implementation of pkg-config
ruby23-pkg-config-1.3.1  Pure Ruby implementation of pkg-config
ruby22-pkg-config-1.3.1  Pure Ruby implementation of pkg-config
py36-pkgconfig-1.3.1  Python wrapper for pkg-config
py35-pkgconfig-1.3.1  Python wrapper for pkg-config
py34-pkgconfig-1.3.1  Python wrapper for pkg-config
py27-pkgconfig-1.3.1  Python wrapper for pkg-config
pkgconf-1.4.1nb1     API-driven pkg-config replacement
pkg-config-0.29.2    System for managing library compile/link flags
p5-ExtUtils-PkgConfig-1.16nb1  Simplistic perl interface to pkg-config

In 2018Q3:

# pkgin search pkg-config
verifypc-1.7         Sanity check package dependencies according to pkg-config
ruby25-pkg-config-1.3.1  Pure Ruby implementation of pkg-config
ruby24-pkg-config-1.3.1  Pure Ruby implementation of pkg-config
ruby23-pkg-config-1.3.1  Pure Ruby implementation of pkg-config
ruby22-pkg-config-1.3.1  Pure Ruby implementation of pkg-config
py37-pkgconfig-1.4.0  Python wrapper for pkg-config
py36-pkgconfig-1.4.0  Python wrapper for pkg-config
py35-pkgconfig-1.4.0  Python wrapper for pkg-config
py34-pkgconfig-1.4.0  Python wrapper for pkg-config
py27-pkgconfig-1.4.0  Python wrapper for pkg-config
pkgconf-1.4.1nb1     API-driven pkg-config replacement
p5-ExtUtils-PkgConfig-1.16nb2  Simplistic perl interface to pkg-config

Note that "pkg-config" package is missing in 2018Q3.

Thanks!