diff --git a/Makefile b/Makefile
index 48677b1a..58996132 100644
--- a/Makefile
+++ b/Makefile
@@ -34,15 +34,20 @@ RM_R               ?= $(RM) -r
 
 TEE_STDERR         ?= | tee /dev/stderr
 CPPFLAGS_GLIB      ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) glib-2.0 --cflags)
-LIBS_GLIB          ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) glib-2.0 --libs-only-L) $(shellpkg-config glib-2.0 --libs-only-l)
+LIBS_GLIB          ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) glib-2.0 --libs-only-L) \
+                      $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) glib-2.0 --libs-only-l)
 CPPFLAGS_XML       ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) libxml-2.0 --cflags)
-LIBS_XML           ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) libxml-2.0 --libs-only-L) $(shellpkg-config libxml-2.0 --libs-only-l)
+LIBS_XML           ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) libxml-2.0 --libs-only-L) \
+                      $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) libxml-2.0 --libs-only-l)
 CPPFLAGS_PNG       ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) libpng --cflags)
-LIBS_PNG           ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) libpng --libs-only-L) $(shellpkg-config libpng --libs-only-l)
+LIBS_PNG           ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) libpng --libs-only-L) \
+                      $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) libpng --libs-only-l)
 CPPFLAGS_GTK       ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) gtk+-2.0 --cflags)
-LIBS_GTK           ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) gtk+-2.0 --libs-only-L) $(shellpkg-config gtk+-2.0 --libs-only-l)
+LIBS_GTK           ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) gtk+-2.0 --libs-only-L) \
+                      $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) gtk+-2.0 --libs-only-l)
 CPPFLAGS_GTKGLEXT  ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) gtkglext-1.0 --cflags)
-LIBS_GTKGLEXT      ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) gtkglext-1.0 --libs-only-L) $(shellpkg-config gtkglext-1.0 --libs-only-l)
+LIBS_GTKGLEXT      ?= $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) gtkglext-1.0 --libs-only-L) \
+                      $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) $(PKGCONFIG) gtkglext-1.0 --libs-only-l)
 CPPFLAGS_GL        ?=
 LIBS_GL            ?= -lGL # -lopengl32 on Win32
 CPPFLAGS_DL        ?=