Update path in make command

Planeshifter · Planeshifter · commit c30e12aa39c3 · 2017-12-26T12:01:22.000+01:00
diff --git a/tools/make/lib/bib/reference.mk b/tools/make/lib/bib/reference.mk
@@ -5,7 +5,7 @@
 CITATION ?=
 
 # Define the command for returning a citation reference:
-CITATION_REFERENCE ?= $(NODE) $(TOOLS_DIR)/bib/citation-reference/bin/cli
+CITATION_REFERENCE ?= $(NODE) $(TOOLS_PKGS_DIR)/bib/citation-reference/bin/cli
 
 # Define the command-line options to be used when executing the command:
 CITATION_REFERENCE_FLAGS ?= \
