diff --git a/internal/rosa/all.go b/internal/rosa/all.go
index 19242c65..5ca1fb63 100644
--- a/internal/rosa/all.go
+++ b/internal/rosa/all.go
@@ -74,6 +74,7 @@ const (
 	LibXau
 	Libbsd
 	Libcap
+	Libev
 	Libexpat
 	Libiconv
 	Libpsl
diff --git a/internal/rosa/libev.go b/internal/rosa/libev.go
new file mode 100644
index 00000000..b4c7fe8a
--- /dev/null
+++ b/internal/rosa/libev.go
@@ -0,0 +1,26 @@
+package rosa
+
+import "hakurei.app/internal/pkg"
+
+func (t Toolchain) newLibev() (pkg.Artifact, string) {
+	const (
+		version  = "4.33"
+		checksum = "774eSXV_4k8PySRprUDChbEwsw-kzjIFnJ3MpNOl5zDpamBRvC3BqPyRxvkwcL6_"
+	)
+	return t.NewPackage("libev", version, pkg.NewHTTPGetTar(
+		nil, "https://dist.schmorp.de/libev/Attic/libev-"+version+".tar.gz",
+		mustDecode(checksum),
+		pkg.TarGzip,
+	), nil, (*MakeHelper)(nil)), version
+}
+func init() {
+	artifactsM[Libev] = Metadata{
+		f: Toolchain.newLibev,
+
+		Name:        "libev",
+		Description: "a full-featured and high-performance event loop",
+		Website:     "http://libev.schmorp.de/",
+
+		ID: 1605,
+	}
+}