diff --git a/.travis.yml b/.travis.yml
index dc09d213b..408e5d59b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,5 +12,5 @@ git:
     depth: 10
 language: c
 script:
-    - make PREFIX=/tmp/acki -j4
+    - make PREFIX=/tmp/acki
 
diff --git a/Makefile b/Makefile
index 0ca97d617..635650bc4 100644
--- a/Makefile
+++ b/Makefile
@@ -61,6 +61,8 @@ INSDIR = $(abspath $(BUILDDIR)/staging)
 PLATIND = $(INSDIR)/share/ack
 PLATDEP = $(INSDIR)/lib/ack
 
+.NOTPARALLEL:
+
 MAKECMDGOALS ?= +ack
 BUILD_FILES = $(shell find * -name '*.lua')