dnl Make sure they are available.
m4_pattern_forbid([PKG_CHECK_MODULES])
m4_pattern_forbid([GUILE_MODULE_AVAILABLE])
-m4_pattern_forbid([^GUILE_P$])
+m4_pattern_forbid([^GUILE_P])
+m4_pattern_allow([^GUILE_PKG_ERRORS])
m4_pattern_forbid([^GUIX_])
dnl Search for 'guile' and 'guild'. This macro defines