ENV_VAR_HELP="ENVIRONMENT VARIABLES:

 PKGRC    [~/.pkg/pkgrc]    the config file used by Pkg

 HIDE_INSTALLED [=false]    if true, ignore/hide installed packages
 HIDE_BUILTINS   [=true]    if true, ignore/hide builtin packages
 HIDE_USER_PKGS  [=true]    if true, ignore/hide user installed packages
 NO_ALIASES     [=false]    if true, ignore package name aliases in searches
 NO_INSTALL     [=false]    if true, skip installing of packages
 PKG_NO_COLOURS [=false]    if true, disable coloured output

 When BUILDTOOL=buildpet in ~/.pkg/pkgrc (use with \`pkg build\` command):

 PKG_CONFIGURE  [='']       custom configure options fpr building packages
 PKG_CFLAGS     [='']       custom CFLAG options for buiding packages"

