diff --git a/execfile_unix.go b/execfile_unix.go
index 44f924a..fd83f56 100644
--- a/execfile_unix.go
+++ b/execfile_unix.go
@@ -1,4 +1,4 @@
-// +build linux darwin
+// +build unix
 
 package main
 
diff --git a/job_unix.go b/job_unix.go
index 5029012..1cfdd57 100644
--- a/job_unix.go
+++ b/job_unix.go
@@ -1,5 +1,4 @@
-// +build darwin linux
-
+// +build darwin unix
 package main
 
 import (
diff --git a/signal_unix.go b/signal_unix.go
index 2e6c885..921c4b8 100644
--- a/signal_unix.go
+++ b/signal_unix.go
@@ -1,4 +1,4 @@
-// +build darwin linux
+// +build unix
 
 package main
 
diff --git a/vars_linux.go b/vars_unix.go
similarity index 97%
rename from vars_linux.go
rename to vars_unix.go
index e1160ba..04a7a91 100644
--- a/vars_linux.go
+++ b/vars_unix.go
@@ -1,4 +1,4 @@
-// +build linux
+// +build unix
 
 package main