diff --git a/pkg/tlsf/Makefile b/pkg/tlsf/Makefile
index 93aac0541..fb27fb274 100644
--- a/pkg/tlsf/Makefile
+++ b/pkg/tlsf/Makefile
@@ -2,29 +2,29 @@ PKG_NAME = tlsf
 PKG_VERSION = 3.0
 PKG_FILE = tlsf-$(PKG_VERSION).zip
 PKG_URL = http://download.riot-os.org/$(PKG_FILE)
-PKG_DIR=$(CURDIR)/$(PKG_NAME)
+PKG_DIR=$(CURDIR)
+PKG_BUILDDIR=$(BINDIRBASE)/pkg/$(BOARD)/$(PKG_NAME)
+PKG_SRCDIR=$(PKG_BUILDDIR)/src
 
 .PHONY: all clean distclean
 
-all: $(PKG_DIR)/$(PKG_NAME).a
+all: $(PKG_SRCDIR)/$(PKG_NAME).a
 
-$(PKG_DIR)/$(PKG_NAME).a: $(PKG_DIR)/Makefile
+$(PKG_SRCDIR)/$(PKG_NAME).a: $(PKG_SRCDIR)/Makefile
 	$(AD)make -C $(<D)
 
-$(PKG_DIR)/Makefile: $(CURDIR)/$(PKG_FILE) $(CURDIR)/patch.txt
-	@rm -rf $(@D)
-	@mkdir -p $(@D)
-	$(AD)cd $(@D) && $(UNZIP_HERE) $(CURDIR)/$(PKG_FILE)
+$(PKG_SRCDIR)/Makefile: $(PKG_BUILDDIR)/$(PKG_FILE) $(CURDIR)/patch.txt
+	rm -rf $(@D)
+	mkdir -p $(@D)
+	$(AD)cd $(@D) && $(UNZIP_HERE) $(PKG_BUILDDIR)/$(PKG_FILE)
 	$(AD)cd $(@D) && patch --binary -p0 -N -i $(CURDIR)/patch.txt
 
-$(CURDIR)/$(PKG_FILE):
+$(PKG_BUILDDIR)/$(PKG_FILE):
+	@mkdir -p $(@D)
 	$(AD)$(DOWNLOAD_TO_FILE) $@ $(PKG_URL)
 
 clean::
-	rm -rf $(PKG_DIR)/
-
-distclean:: clean
-	rm -f $(CURDIR)/$(PKG_FILE)
+	rm -rf $(PKG_SRCDIR)/
 
-Makefile.include:
-	@true
+distclean::
+	rm -rf $(PKG_BUILDDIR)/
diff --git a/pkg/tlsf/Makefile.include b/pkg/tlsf/Makefile.include
index 15ce4f125..3f00a5695 100644
--- a/pkg/tlsf/Makefile.include
+++ b/pkg/tlsf/Makefile.include
@@ -1 +1 @@
-INCLUDES += -I$(RIOTPKG)/tlsf/tlsf
+INCLUDES += -I$(BINDIRBASE)/pkg/$(BOARD)/tlsf/src