diff --git a/Makefile b/Makefile
index 2d215dc..eb37053 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ NAME=gost
 BINDIR=bin
 VERSION=$(shell cat gost.go | grep 'Version =' | sed 's/.*\"\(.*\)\".*/\1/g')
 GOBUILD=CGO_ENABLED=0 go build --ldflags="-s -w" -v -x -a
-GOFILES=cmd/gost/*
+GOFILES=cmd/gost/*.go
 
 PLATFORM_LIST = \
 	darwin-amd64 \
diff --git a/chain.go b/chain.go
index 9a973ff..966a53f 100644
--- a/chain.go
+++ b/chain.go
@@ -133,10 +133,6 @@ func (c *Chain) DialContext(ctx context.Context, network, address string, opts .
 	return
 }
 
-func setSocketMark(fd int, value int) (e error) {
-	return syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_MARK, value)
-}
-
 func (c *Chain) dialWithOptions(ctx context.Context, network, address string, options *ChainOptions) (net.Conn, error) {
 	if options == nil {
 		options = &ChainOptions{}
diff --git a/sockopts_linux.go b/sockopts_linux.go
new file mode 100644
index 0000000..f35423e
--- /dev/null
+++ b/sockopts_linux.go
@@ -0,0 +1,7 @@
+package gost
+
+import "syscall"
+
+func setSocketMark(fd int, value int) (e error) {
+	return syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_MARK, value)
+}
diff --git a/sockopts_other.go b/sockopts_other.go
new file mode 100644
index 0000000..c0dd1b8
--- /dev/null
+++ b/sockopts_other.go
@@ -0,0 +1,7 @@
+//go:build !linux
+
+package gost
+
+func setSocketMark(fd int, value int) (e error) {
+	return nil
+}