diff --git a/cmd/publish_linux.go b/cmd/publish_linux.go
deleted file mode 100644
index 2ff32cc6..00000000
--- a/cmd/publish_linux.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package cmd
-
-import "syscall"
-
-func processExists(pid int) bool {
-	err := syscall.Kill(pid, syscall.Signal(0))
-	return err == nil
-}
diff --git a/cmd/publish_darwin.go b/cmd/publish_unix.go
similarity index 69%
rename from cmd/publish_darwin.go
rename to cmd/publish_unix.go
index 2ff32cc6..67bf2168 100644
--- a/cmd/publish_darwin.go
+++ b/cmd/publish_unix.go
@@ -1,3 +1,5 @@
+// +build darwin linux dragonfly freebsd netbsd openbsd
+
 package cmd
 
 import "syscall"
diff --git a/cmd/subscribe_linux.go b/cmd/subscribe_unix.go
similarity index 89%
rename from cmd/subscribe_linux.go
rename to cmd/subscribe_unix.go
index 346606bd..7c02a944 100644
--- a/cmd/subscribe_linux.go
+++ b/cmd/subscribe_unix.go
@@ -1,3 +1,5 @@
+// +build linux dragonfly freebsd netbsd openbsd
+
 package cmd
 
 const (