diff --git a/makefile b/makefile
index 9112e6c..181e9f5 100644
--- a/makefile
+++ b/makefile
@@ -1,7 +1,7 @@
-SOURCES=index.md
-COMPILED=index.html index-html5.html index.tex index.pdf
-TEMPLATEPATH=./templates/
-FILTERPATH=./py/
+SOURCES:=index.md
+COMPILED:=index.html index-html5.html index.tex index.pdf
+TEMPLATEPATH:=./templates/
+FILTERPATH:=./py/
 
 all: $(COMPILED)
 
diff --git a/makefile-local b/makefile-local
index d7277b5..be25c5a 100644
--- a/makefile-local
+++ b/makefile-local
@@ -1,13 +1,13 @@
-SOURCES=index.md
-COMPILED=index.html index-html5.html index.tex index.pdf
+SOURCES:=index.md
+COMPILED:=index.html index-html5.html index.tex index.pdf
 
 all: $(SOURCES) $(COMPILED)
 
 index.html: $(SOURCES)
-	pandoc -s --toc --mathjax -o test-local.html $(SOURCES)
+	pandoc -s --toc --mathjax -o test-local.html $<
 index-html5.html: $(SOURCES)
-	pandoc -s --toc --mathjax -t html5 -o test-local-html5.html $(SOURCES)
+	pandoc -s --toc --mathjax -t html5 -o test-local-html5.html $<
 index.tex: $(SOURCES)
-	pandoc -s --toc --filter=pandoc-amsthm.py -o test-local.tex $(SOURCES)
+	pandoc -s --toc --filter=pandoc-amsthm.py -o test-local.tex $<
 index.pdf: $(SOURCES)
-	pandoc -s --toc --filter=pandoc-amsthm.py -o test-local.pdf $(SOURCES)
\ No newline at end of file
+	pandoc -s --toc --filter=pandoc-amsthm.py -o test-local.pdf $<
\ No newline at end of file