diff --git a/lib/sys/linux.q b/lib/sys/sys_linux.q
similarity index 100%
rename from lib/sys/linux.q
rename to lib/sys/sys_linux.q
diff --git a/lib/sys/sys_mac.q b/lib/sys/sys_mac.q
new file mode 100644
index 0000000..9ef9e1f
--- /dev/null
+++ b/lib/sys/sys_mac.q
@@ -0,0 +1,27 @@
+read(fd Int, address Pointer, length Int) -> Int {
+	return syscall(0x2000003, fd, address, length)
+}
+
+write(fd Int, address Pointer, length Int) -> Int {
+	return syscall(0x2000004, fd, address, length)
+}
+
+open(file Pointer, flags Int, mode Int) -> Int {
+	return syscall(0x2000005, file, flags, mode)
+}
+
+close(fd Int) -> Int {
+	return syscall(0x2000006, fd)
+}
+
+mmap(address Int, length Int, protection Int, flags Int) -> Pointer {
+	return syscall(0x20000C5, address, length, protection, flags)
+}
+
+munmap(address Pointer, length Int) -> Int {
+	return syscall(0x2000049, address, length)
+}
+
+exit(status Int) {
+	syscall(0x2000001, status)
+}
\ No newline at end of file
diff --git a/src/scanner/queueDirectory.go b/src/scanner/queueDirectory.go
index 167905b..f1abe54 100644
--- a/src/scanner/queueDirectory.go
+++ b/src/scanner/queueDirectory.go
@@ -4,6 +4,7 @@ import (
 	"path/filepath"
 	"strings"
 
+	"git.akyoto.dev/cli/q/src/config"
 	"git.akyoto.dev/cli/q/src/fs"
 )
 
@@ -20,6 +21,14 @@ func (s *Scanner) queueDirectory(directory string, pkg string) {
 			return
 		}
 
+		if strings.HasSuffix(name, "_linux.q") && config.TargetOS != "linux" {
+			return
+		}
+
+		if strings.HasSuffix(name, "_mac.q") && config.TargetOS != "mac" {
+			return
+		}
+
 		fullPath := filepath.Join(directory, name)
 		s.queueFile(fullPath, pkg)
 	})