diff --git a/config.gnu.mk b/config.gnu.mk
index f1151b9..9dc4a63 100644
--- a/config.gnu.mk
+++ b/config.gnu.mk
@@ -132,27 +132,31 @@ MIQ_CFGLFLAGS=	$(MIQ_LDFLAGS)						\
 MIQ_CFGFLAGS=	$(MIQ_CFGLFLAGS)					\
 		$(shell $(CAT) $(MIQ_PKGCFLAGS) $(MIQ_PKGLDFLAGS))
 
+MIQ_CFGSET=	&& MIQ_CFGRC=1 || MIQ_CFGRC=0;
 MIQ_CFGTEST=	"$<" -o "$<".exe > "$<".err 2>&1 &&			\
 		[ -x "$<".exe ] &&					\
-		"$<".exe > "$<".out && MIQ_CFGRC=1 || MIQ_CFGRC=0;
+		"$<".exe > "$<".out					\
+		$(MIQ_CFGSET)
 MIQ_CFGUNDEF0=	$$MIQ_CFGRC						\
 	| sed -e 's|^\#define \(.*\) 0$$|/* \#undef \1 */|g' > "$@";	\
 	[ -f "$<".out ] && cat >> "$@" "$<".out; true
 
 MIQ_CFGDEF=	echo '\#define'
 
-MIQ_CFGCFLAGS=	$(MIQ_CFLAGS)  $(MIQ_CFGFLAGS) $(CFLAGS_CONFIG_$*)
-MIQ_CFGCXXFLAGS=$(MIQCXXFLAGS) $(MIQ_CFGFLAGS) $(CFLAGS_CONFIG_$*)
+MIQ_CFGCFLAGS=	$(CFLAGS)   $(CFLAGS_CONFIG_$*)
+MIQ_CFGCXXFLAGS=$(CXXFLAGS) $(CFLAGS_CONFIG_$*)
 
-MIQ_CFGCC_CMD=	$(CC)  $(MIQ_CFGCFLAGS)   $(MIQ_CFGTEST)
-MIQ_CFGCXX_CMD=	$(CXX) $(MIQ_CFGCXXFLAGS) $(MIQ_CFGTEST)
-MIQ_CFGLIB_CMD=	$(CC)  $(MIQ_CFGLFLAGS)  -l$* $(MIQ_CFGTEST)
-MIQ_CFGFN_CMD=	$(CC)  $(MIQ_CFGCFLAGS) $(CFLAGS_CONFIG_$*)        $(MIQ_CFGTEST)
+MIQ_CFGCC_CMD=	$(CC)  $(MIQ_CFGCFLAGS)   			$(MIQ_CFGTEST)
+MIQ_CFGCXX_CMD=	$(CXX) $(MIQ_CFGCXXFLAGS) 			$(MIQ_CFGTEST)
+MIQ_CFGLIB_CMD=	$(CC)  $(MIQ_CFGLFLAGS)  -l$* 			$(MIQ_CFGTEST)
+MIQ_CFGFN_CMD=	$(CC)  $(MIQ_CFGCFLAGS) $(CFLAGS_CONFIG_$*)	$(MIQ_CFGTEST)
+MIQ_CFGPK_CMD=  pkg-config $* --silence-errors 			$(MIQ_CFGSET)
 
-CC_CONFIG=	$(MIQ_CFGCC_CMD)  $(MIQ_CFGDEF) HAVE_$(MIQ_CFGUPPER)_H 	$(MIQ_CFGUNDEF0)
-CXX_CONFIG=	$(MIQ_CFGCXX_CMD) $(MIQ_CFGDEF) HAVE_$(MIQ_CFGUPPER)   	$(MIQ_CFGUNDEF0)
-LIB_CONFIG=	$(MIQ_CFGLIB_CMD) $(MIQ_CFGDEF) HAVE_LIB$(MIQ_CFGUPPER)	$(MIQ_CFGUNDEF0)
-FN_CONFIG=	$(MIQ_CFGFN_CMD)  $(MIQ_CFGDEF) HAVE_$(MIQ_CFGUPPER) 	$(MIQ_CFGUNDEF0)
+MIQ_CC_CFG=	$(MIQ_CFGCC_CMD)  $(MIQ_CFGDEF) HAVE_$(MIQ_CFGUPPER)_H 	$(MIQ_CFGUNDEF0)
+MIQ_CXX_CFG=	$(MIQ_CFGCXX_CMD) $(MIQ_CFGDEF) HAVE_$(MIQ_CFGUPPER)   	$(MIQ_CFGUNDEF0)
+MIQ_LIB_CFG=	$(MIQ_CFGLIB_CMD) $(MIQ_CFGDEF) HAVE_LIB$(MIQ_CFGUPPER)	$(MIQ_CFGUNDEF0)
+MIQ_FN_CFG=	$(MIQ_CFGFN_CMD)  $(MIQ_CFGDEF) HAVE_$(MIQ_CFGUPPER) 	$(MIQ_CFGUNDEF0)
+MIQ_PK_CFG=	$(MIQ_CFGPK_CMD)  $(MIQ_CFGDEF) HAVE_$(MIQ_CFGUPPER)    $(MIQ_CFGUNDEF0)
 
-MAKE_CONFIG=	sed	-e 's|^\#define \([^ ]*\) \(.*\)$$|\1=\2|g' 	\
+MIQ_MK_CFG=	sed	-e 's|^\#define \([^ ]*\) \(.*\)$$|\1=\2|g' 	\
 			-e 's|.*undef.*||g' < "$<" > "$@"
diff --git a/config.mk b/config.mk
index 0ac7ddf..35a2fef 100644
--- a/config.mk
+++ b/config.mk
@@ -65,7 +65,7 @@ NOT_PARALLEL?=  .NOTPARALLEL
 GIT_REVISION:=  $(shell git rev-parse --short HEAD 2> /dev/null || echo "unknown")
 
 # Package installation directory
-PACKAGE_DIR=$(PACKAGE_NAME:%=%/)
+PACKAGE_DIR?=$(PACKAGE_NAME:%=%/)
 PACKAGE_LIBS=$(MIQ_PRODLIB)
 PACKAGE_DLLS=$(MIQ_PRODDLL)
 
diff --git a/rules.mk b/rules.mk
index c425a12..f3c032f 100644
--- a/rules.mk
+++ b/rules.mk
@@ -436,7 +436,9 @@ $(MIQ_OUTEXE): $(MIQ_TOLINK) $$(MIQ_TOLINK)			$(MIQ_MAKEDEPS)
 # Package configuration file
 MIQ_PKGCFLAGS= 	$(PKGCONFIGS:%=$(MIQ_OBJDIR)%.pkg-config.cflags)
 MIQ_PKGLDFLAGS=	$(PKGCONFIGS:%=$(MIQ_OBJDIR)%.pkg-config.ldflags)
-MIQ_PKGLIBS=	$(patsubst %,$(OBJDIR)%.cfg.ldflags,$(filter lib%,$(CONFIG)))
+MIQ_PKGCONFIGS=	$(PKGCONFIGS:%?=%)
+MIQ_PKGCFG=	$(MIQ_PKGONFIGS:%=$(MIQ_OBJDIR)CFG_HAVE_PACKAGE_%.h)
+MIQ_PKGLIBS=	$(patsubst %,$(MIQ_OBJDIR)%.cfg.ldflags,$(filter lib%,$(CONFIG)))
 MIQ_PKGDEPS=	$(MIQ_MAKEDEPS) $(MIQ_OBJDIR).mkdir
 
 # Build the package config from cflags, ldflags and libs config
@@ -467,7 +469,7 @@ $(MIQ_OBJDIR)lib%.cfg.ldflags: $(MIQ_OBJDIR)CFG_HAVE_lib%.h		$(MIQ_PKGDEPS)
 #------------------------------------------------------------------------------
 
 # Normalize header configuration name (turn <foo.h> into .lt.foo.h.gt. and back)
-MIQ_NORMCONFIG=$(subst <,.lt.,$(subst >,.gt.,$(subst /,.sl.,$(CONFIG))))
+MIQ_NORMCONFIG=$(subst <,.lt.,$(subst >,.gt.,$(subst /,.sl.,$(CONFIG) $(PKGCONFIGS:%=PACKAGE_%))))
 MIQ_ORIGTARGET=$(subst .lt.,<,$(subst .gt.,>,$(subst .sl.,/,$*)))
 MIQ_CONFIGDEPS=	$(MIQ_PKGDEPS) 						\
 		$(PKGCONFIGS:%=$(MIQ_OBJDIR)pkg-config.mk)		\
@@ -479,39 +481,44 @@ config.h: $(MIQ_NORMCONFIG:%=$(MIQ_OBJDIR)CFG_HAVE_%.h)
 
 # Build makefile configuration files from generated .h files
 $(MIQ_OBJDIR)CFG_HAVE_%.mk: $(MIQ_OBJDIR)CFG_HAVE_%.h 		$(MIQ_MAKEDEPS)
-	$(PRINT_COMMAND) $(MAKE_CONFIG)
+	$(PRINT_COMMAND) $(MIQ_MK_CFG)
 -include $(MIQ_NORMCONFIG:%=$(MIQ_OBJDIR)CFG_HAVE_%.mk)
 
 # C standard headers, e.g. HAVE_<stdio.h>
 $(MIQ_OBJDIR)CFG_HAVE_.lt.%.h.gt..h: $(MIQ_OBJDIR)CFGCH%.c	$(MIQ_CONFIGDEPS)
-	$(PRINT_CONFIG) $(CC_CONFIG)
+	$(PRINT_CONFIG) $(MIQ_CC_CFG)
 $(MIQ_OBJDIR)CFGCH%.c: $(MIQ_OBJDIR).mkdir			$(MIQ_CONFIGDEPS)
 	$(PRINT_COMMAND) (echo '#include' "<$(MIQ_ORIGTARGET).h>" && echo 'int main() { return 0; }') > "$@"
 .PRECIOUS: $(MIQ_OBJDIR)CFGCH%.c
 
 # C++ Standard headers, e.g. HAVE_<iostream>
 $(MIQ_OBJDIR)CFG_HAVE_.lt.%.gt..h: $(MIQ_OBJDIR)CFGCPPH%.cpp	$(MIQ_CONFIGDEPS)
-	$(PRINT_CONFIG) $(CXX_CONFIG)
+	$(PRINT_CONFIG) $(MIQ_CXX_CFG)
 $(MIQ_OBJDIR)CFGCPPH%.cpp: $(MIQ_OBJDIR).mkdir			$(MIQ_CONFIGDEPS)
 	$(PRINT_COMMAND) (echo '#include' "<$(MIQ_ORIGTARGET)>" && echo 'int main() { return 0; }') > "$@"
 .PRECIOUS: $(MIQ_OBJDIR)CFGCPPH%.cpp
 
 # Library, e.g. libm
 $(MIQ_OBJDIR)CFG_HAVE_lib%.h: $(MIQ_OBJDIR)CFGLIB%.c		$(MIQ_PKGDEPS)
-	$(PRINT_LIBCONFIG) $(LIB_CONFIG)
+	$(PRINT_CONFIG) $(MIQ_LIB_CFG)
 $(MIQ_OBJDIR)CFGLIB%.c: 					$(MIQ_PKGDEPS)
 	$(PRINT_COMMAND) echo 'int main() { return 0; }' > "$@"
 .PRECIOUS: $(MIQ_OBJDIR)CFGLIB%.c
 
 # Check if a function is present (code to test in config/check_foo.c)
 $(MIQ_OBJDIR)CFG_HAVE_%.h: $(MIQ_OBJDIR)CFGFN%.c		$(MIQ_CONFIGDEPS)
-	$(PRINT_CONFIG)	$(FN_CONFIG)
+	$(PRINT_CONFIG)	$(MIQ_FN_CFG)
 $(MIQ_OBJDIR)CFGFN%.c: $(CONFIG_SOURCES)check_%.c		$(MIQ_CONFIGDEPS)
 	$(PRINT_COMMAND) cp $< $@
 $(MIQ_OBJDIR)CFGFN%.c: config/check_%.c				$(MIQ_CONFIGDEPS)
 	$(PRINT_COMMAND) cp $< $@
 .PRECIOUS: $(MIQ_OBJDIR)CFGFN%.c
 
+# Packages
+$(MIQ_OBJDIR)CFG_HAVE_PACKAGE_%?.h: 				$(MIQ_CONFIGDEPS)
+	$(PRINT_CONFIG) $(MIQ_PK_CFG)
+$(MIQ_OBJDIR)CFG_HAVE_PACKAGE_%.h: 				$(MIQ_CONFIGDEPS)
+	$(PRINT_CONFIG) $(MIQ_PK_CFG)
 endif