diff --git a/coreutils-colorls.sh b/coreutils-colorls.sh
index 25e9f4e..31c393f 100755
--- a/coreutils-colorls.sh
+++ b/coreutils-colorls.sh
@@ -1,3 +1,6 @@
+# Skip all for noninteractive shells.
+[ ! -t 0 ] && return
+
 # Color ls by default
 alias ll='ls -l --color=auto' 2>/dev/null
 alias l.='ls -d .* --color=auto' 2>/dev/null