diff --git a/samples/spi.go b/samples/spi.go
index f23fb0d..0d7b397 100644
--- a/samples/spi.go
+++ b/samples/spi.go
@@ -1,3 +1,5 @@
+// +build ignore
+
 package main
 
 import (
diff --git a/samples/spimcp3008.go b/samples/spimcp3008.go
index 12b60d8..4648c80 100644
--- a/samples/spimcp3008.go
+++ b/samples/spimcp3008.go
@@ -1,3 +1,5 @@
+// +build ignore
+
 package main
 
 import (