diff --git a/internal/rosa/all.go b/internal/rosa/all.go
index 9d5f8535..d670823e 100644
--- a/internal/rosa/all.go
+++ b/internal/rosa/all.go
@@ -181,6 +181,7 @@ const (
 	Rdfind
 	Readline
 	Rsync
+	Ruby
 	Sed
 	SPIRVHeaders
 	SPIRVLLVMTranslator
diff --git a/internal/rosa/ruby.go b/internal/rosa/ruby.go
new file mode 100644
index 00000000..50c73550
--- /dev/null
+++ b/internal/rosa/ruby.go
@@ -0,0 +1,40 @@
+package rosa
+
+import (
+	"strings"
+
+	"hakurei.app/internal/pkg"
+)
+
+func (t Toolchain) newRuby() (pkg.Artifact, string) {
+	const (
+		version  = "4.0.4"
+		checksum = "QyulcwFhodxYsuYu2MfMgk5nnVpsR5NO2NGsJ3AIMFJQdafn6ZkFBJhVp_XhU6gU"
+	)
+	return t.NewPackage("ruby", version, newTar(
+		"https://cache.ruby-lang.org/pub/ruby/"+
+			strings.Join(strings.SplitN(version, ".", 3)[:2], ".")+
+			"/ruby-"+version+".tar.gz",
+		checksum,
+		pkg.TarGzip,
+	), nil, &MakeHelper{
+		SkipCheck: true,
+		Configure: []KV{[2]string{"--disable-install-doc"}},
+	},
+		Libffi,
+		OpenSSL,
+	), version
+}
+func init() {
+	artifactsM[Ruby] = Metadata{
+		f: Toolchain.newRuby,
+
+		Name:        "ruby",
+		Description: "a programming language",
+		Website:     "https://www.ruby-lang.org/",
+
+		// TODO(ophestra): resolve runtime deps
+
+		ID: 4223,
+	}
+}