diff --git a/Makefile b/Makefile
index 3008779..a7b2731 100644
--- a/Makefile
+++ b/Makefile
@@ -68,8 +68,13 @@
 else
   GYPFLAGS += -Dv8_can_use_vfp_instructions=true
 endif
+# soname_version=1.2.3
+ifdef soname_version
+  GYPFLAGS += -Dsoname_version=$(soname_version)
+endif
 
 # ----------------- available targets: --------------------
+# - "dependencies": pulls in external dependencies (currently: GYP)
 # - any arch listed in ARCHES (see below)
 # - any mode listed in MODES
 # - every combination <arch>.<mode>, e.g. "ia32.release"
@@ -98,8 +103,9 @@
 # File where previously used GYPFLAGS are stored.
 ENVFILE = $(OUTDIR)/environment
 
-.PHONY: all clean $(ENVFILE).new \
-        $(ARCHES) $(MODES) $(BUILDS) $(addsuffix .clean,$(ARCHES))
+.PHONY: all check clean dependencies $(ENVFILE).new \
+        $(ARCHES) $(MODES) $(BUILDS) $(CHECKS) $(addsuffix .clean,$(ARCHES)) \
+        $(addsuffix .check,$(MODES)) $(addsuffix .check,$(ARCHES))
 
 # Target definitions. "all" is the default.
 all: $(MODES)
@@ -169,3 +175,8 @@
 # Stores current GYPFLAGS in a file.
 $(ENVFILE).new:
 	@mkdir -p $(OUTDIR); echo "GYPFLAGS=$(GYPFLAGS)" > $(ENVFILE).new;
+
+# Dependencies.
+dependencies:
+	svn checkout --force http://gyp.googlecode.com/svn/trunk build/gyp \
+	    --revision 1026