INSTALLED_GHC_PKG_REAL=$(DESTDIR)$(bindir)/ghc-pkg.exe
endif
-INSTALLED_PACKAGES = $(filter-out haskeline mtl terminfo utf8-string,$(PACKAGES))
+INSTALLED_PACKAGES := $(filter-out haskeline mtl terminfo utf8-string,$(PACKAGES))
+ifeq "$(InstallExtraPackages)" "NO"
+INSTALLED_PACKAGES := $(filter-out $(EXTRA_PACKAGES), $(INSTALLED_PACKAGES))
+endif
+
HIDDEN_PACKAGES = binary
define set_INSTALL_DISTDIR
# By default, enable SplitObjs for the libraries if this build supports it
SplitObjs=$(SupportsSplitObjs)
+# ----------------------------------------------------------------------------
+# Package-related things
+
+# Extra packages to add to the build, in dependency order
+EXTRA_PACKAGES =
+
+# Whether to install $(EXTRA_PACKAGES)
+InstallExtraPackages = NO
+
+# Run "ghc-pkg check" on each package
CHECK_PACKAGES = NO
# ----------------------------------------------------------------------------