diff --git a/Makefile b/Makefile
index d08be68..ebc8c4c 100644
--- a/Makefile
+++ b/Makefile
@@ -84,7 +84,8 @@
 
 weave_obj_files := $(WEAVE_SRC_FILES:%.cc=out/$(BUILD_MODE)/%.o)
 
-$(weave_obj_files) : out/$(BUILD_MODE)/%.o : %.cc
+# TODO(jacobmarble): There are too many libgtest.a deps in non-test targets. Fix.
+$(weave_obj_files) : out/$(BUILD_MODE)/%.o : %.cc third_party/lib/libgtest.a
 	mkdir -p $(dir $@)
 	$(CXX) $(DEFS_$(BUILD_MODE)) $(INCLUDES) $(CFLAGS) $(CFLAGS_$(BUILD_MODE)) $(CFLAGS_CC) -c -o $@ $<
 
diff --git a/third_party/third_party.mk b/third_party/third_party.mk
index 638d8a7..91e4cf4 100644
--- a/third_party/third_party.mk
+++ b/third_party/third_party.mk
@@ -7,7 +7,8 @@
 
 third_party_chromium_base_obj_files := $(THIRD_PARTY_CHROMIUM_BASE_SRC_FILES:%.cc=out/$(BUILD_MODE)/%.o)
 
-$(third_party_chromium_base_obj_files) : out/$(BUILD_MODE)/%.o : %.cc
+# We don't need libgtest.a, but the headers files in third_party/include.
+$(third_party_chromium_base_obj_files) : out/$(BUILD_MODE)/%.o : %.cc third_party/lib/libgtest.a
 	mkdir -p $(dir $@)
 	$(CXX) $(DEFS_$(BUILD_MODE)) $(INCLUDES) $(CFLAGS) $(CFLAGS_$(BUILD_MODE)) $(CFLAGS_CC) -c -o $@ $<
 
@@ -20,7 +21,8 @@
 
 third_party_chromium_crypto_obj_files := $(THIRD_PARTY_CHROMIUM_CRYPTO_SRC_FILES:%.cc=out/$(BUILD_MODE)/%.o)
 
-$(third_party_chromium_crypto_obj_files) : out/$(BUILD_MODE)/%.o : %.cc
+# We don't need libgtest.a, but the headers files in third_party/include.
+$(third_party_chromium_crypto_obj_files) : out/$(BUILD_MODE)/%.o : %.cc third_party/lib/libgtest.a
 	mkdir -p $(dir $@)
 	$(CXX) $(DEFS_$(BUILD_MODE)) $(INCLUDES) $(CFLAGS) $(CFLAGS_$(BUILD_MODE)) $(CFLAGS_CC) -c -o $@ $<