Index: doc/papers/concurrency/Makefile
===================================================================
--- doc/papers/concurrency/Makefile	(revision fb16d5c2233951d7eeba58c1cb3de31029d98a82)
+++ doc/papers/concurrency/Makefile	(revision 28f3a190cabb48116467ce6e1ebc74a38dac95b7)
@@ -20,6 +20,4 @@
 
 FIGURES = ${addsuffix .tex, \
-monitor \
-ext_monitor \
 int_monitor \
 dependency \
@@ -27,4 +25,6 @@
 
 PICTURES = ${addsuffix .pstex, \
+monitor \
+ext_monitor \
 system \
 monitor_structs \
@@ -59,12 +59,12 @@
 	dvips ${Build}/$< -o $@
 
-${BASE}.dvi : Makefile ${Build} ${BASE}.out.ps WileyNJD-AMA.bst ${GRAPHS} ${PROGRAMS} ${PICTURES} ${FIGURES} ${SOURCES} \
-		annex/local.bib ../../bibliography/pl.bib
+${BASE}.dvi : Makefile ${BASE}.out.ps WileyNJD-AMA.bst ${GRAPHS} ${PROGRAMS} ${PICTURES} ${FIGURES} ${SOURCES} \
+		annex/local.bib ../../bibliography/pl.bib | ${Build}
 	# Must have *.aux file containing citations for bibtex
 	if [ ! -r ${basename $@}.aux ] ; then ${LaTeX} ${basename $@}.tex ; fi
-	${BibTeX} ${Build}/${basename $@}
+	-${BibTeX} ${Build}/${basename $@}
 	# Some citations reference others so run again to resolve these citations
 	${LaTeX} ${basename $@}.tex
-	${BibTeX} ${Build}/${basename $@}
+	-${BibTeX} ${Build}/${basename $@}
 	# Run again to finish citations
 	${LaTeX} ${basename $@}.tex
@@ -72,20 +72,20 @@
 ## Define the default recipes.
 
-${Build}:
+${Build} :
 	mkdir -p ${Build}
 
-${BASE}.out.ps: ${Build}
+${BASE}.out.ps : | ${Build}
 	ln -fs ${Build}/Paper.out.ps .
 
-WileyNJD-AMA.bst:
+WileyNJD-AMA.bst :
 	ln -fs ../AMA/AMA-stix/ama/WileyNJD-AMA.bst .
 
-%.tex : %.fig ${Build}
+%.tex : %.fig | ${Build}
 	fig2dev -L eepic $< > ${Build}/$@
 
-%.ps : %.fig ${Build}
+%.ps : %.fig | ${Build}
 	fig2dev -L ps $< > ${Build}/$@
 
-%.pstex : %.fig ${Build}
+%.pstex : %.fig | ${Build}
 	fig2dev -L pstex $< > ${Build}/$@
 	fig2dev -L pstex_t -p ${Build}/$@ $< > ${Build}/$@_t