diff --git a/.gitignore b/.gitignore
index 8bb62f8..39ff145 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,9 @@
 # Reference copy of original binary
 orig
 
+# Output directory
+out
+
 # Output files
 *.SYS
 *.BIN
diff --git a/.travis.yml b/.travis.yml
index a4fd139..4cdcf00 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,8 +4,7 @@ language: c
 
 install:
   - git clone https://github.com/cc65/cc65 /tmp/cc65 &&
-    make -C /tmp/cc65 bin apple2 apple2enh &&
-    /tmp/cc65/bin/cc65 --version
+    make -C /tmp/cc65 ca65 ld65
 
 script:
   - make CC65=/tmp/cc65/bin
diff --git a/Makefile b/Makefile
index abc84fe..ba6ae9b 100644
--- a/Makefile
+++ b/Makefile
@@ -3,9 +3,16 @@ CC65 = ~/dev/cc65/bin
 CAFLAGS = --target apple2enh --list-bytes 0
 CCFLAGS = --config apple2-asm.cfg
 
-TARGETS = prodos.mod.BIN ns.clock.system.SYS cricket.system.SYS \
-	test.BIN \
-	date.BIN set.time.BIN set.date.BIN
+OUTDIR = out
+
+TARGETS = \
+	$(OUTDIR)/prodos.mod.BIN \
+	$(OUTDIR)/ns.clock.system.SYS \
+	$(OUTDIR)/cricket.system.SYS \
+	$(OUTDIR)/test.BIN \
+	$(OUTDIR)/date.BIN \
+	$(OUTDIR)/set.time.BIN \
+	$(OUTDIR)/set.date.BIN
 
 # For timestamps
 MM = $(shell date "+%m")
@@ -19,12 +26,13 @@ all: $(TARGETS)
 HEADERS = $(wildcard *.inc)
 
 clean:
-	rm -f *.o
-	rm -f $(TARGETS)
+	rm -f $(OUTDIR)/*.o
+	rm -f $(OUTDIR)/*.list
+	rm -f $(OUTDIR)/$(TARGETS)
 
-%.o: %.s $(HEADERS)
+$(OUTDIR)/%.o: %.s $(HEADERS)
 	$(CC65)/ca65 $(CAFLAGS) $(DEFINES) --listing $(basename $@).list -o $@ $<
 
-%.BIN %.SYS: %.o
+$(OUTDIR)/%.BIN $(OUTDIR)/%.SYS: $(OUTDIR)/%.o
 	$(CC65)/ld65 $(CCFLAGS) -o $@ $<
 	xattr -wx prodos.AuxType '00 20' $@