diff --git a/repos/gems/include/depot/archive.h b/repos/gems/include/depot/archive.h
new file mode 100644
index 0000000000..8278beb5fe
--- /dev/null
+++ b/repos/gems/include/depot/archive.h
@@ -0,0 +1,95 @@
+/*
+ * \brief  Utilities to handle depot-archive paths
+ * \author Norman Feske
+ * \date   2017-12-18
+ */
+
+/*
+ * Copyright (C) 2017 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU Affero General Public License version 3.
+ */
+
+#ifndef _INCLUDE__DEPOT__ARCHIVE_H_
+#define _INCLUDE__DEPOT__ARCHIVE_H_
+
+/* Genode includes */
+#include <util/string.h>
+
+namespace Depot {
+	using namespace Genode;
+	struct Archive;
+}
+
+
+struct Depot::Archive
+{
+	typedef String<100> Path;
+	typedef String<64>  User;
+	typedef String<80>  Name;
+	typedef String<40>  Version;
+
+	enum Type { PKG, RAW, SRC };
+
+	struct Unknown_archive_type : Exception { };
+
+	/**
+	 * Return Nth path element
+	 *
+	 * The first path element corresponds to n == 0.
+	 */
+	template <typename STRING>
+	static STRING _path_element(Path const &path, unsigned n)
+	{
+		char const *s = path.string();
+
+		/* skip 'n' path elements */
+		for (; n > 0; n--) {
+
+			/* search '/' */
+			while (*s && *s != '/')
+				s++;
+
+			if (*s == 0)
+				return STRING();
+
+			/* skip '/' */
+			s++;
+		}
+
+		/* find '/' marking the end of the path element */
+		unsigned i = 0;
+		while (s[i] != 0 && s[i] != '/')
+			i++;
+
+		return STRING(Cstring(s, i));
+	}
+
+	/**
+	 * Return archive user of depot-local path
+	 */
+	static User user(Path const &path) { return _path_element<User>(path, 0); }
+
+	/**
+	 * Return archive type of depot-local path
+	 *
+	 * \throw Unknown_archive_type
+	 */
+	static Type type(Path const &path)
+	{
+		typedef String<8> Name;
+		Name const name = _path_element<Name>(path, 1);
+
+		if (name == "src") return SRC;
+		if (name == "pkg") return PKG;
+		if (name == "raw") return RAW;
+
+		throw Unknown_archive_type();
+	}
+
+	static Name    name   (Path const &path) { return _path_element<Name>(path, 2); }
+	static Version version(Path const &path) { return _path_element<Name>(path, 3); }
+};
+
+#endif /* _INCLUDE__DEPOT__ARCHIVE_H_ */
diff --git a/repos/gems/src/app/depot_query/main.cc b/repos/gems/src/app/depot_query/main.cc
index 1c10611b30..af84736aa0 100644
--- a/repos/gems/src/app/depot_query/main.cc
+++ b/repos/gems/src/app/depot_query/main.cc
@@ -17,11 +17,11 @@
 #include <base/attached_rom_dataspace.h>
 #include <os/reporter.h>
 #include <gems/vfs.h>
+#include <depot/archive.h>
 
 namespace Depot_query {
-	using namespace Genode;
+	using namespace Depot;
 	struct Recursion_limit;
-	struct Archive;
 	struct Dependencies;
 	struct Main;
 }
@@ -62,76 +62,6 @@ class Depot_query::Recursion_limit : Noncopyable
 };
 
 
-struct Depot_query::Archive
-{
-	typedef String<100> Path;
-	typedef String<64>  User;
-	typedef String<80>  Name;
-	typedef String<40>  Version;
-
-	enum Type { PKG, RAW, SRC };
-
-	struct Unknown_archive_type : Exception { };
-
-	/**
-	 * Return Nth path element
-	 *
-	 * The first path element corresponds to n == 0.
-	 */
-	template <typename STRING>
-	static STRING _path_element(Path const &path, unsigned n)
-	{
-		char const *s = path.string();
-
-		/* skip 'n' path elements */
-		for (; n > 0; n--) {
-
-			/* search '/' */
-			while (*s && *s != '/')
-				s++;
-
-			if (*s == 0)
-				return STRING();
-
-			/* skip '/' */
-			s++;
-		}
-
-		/* find '/' marking the end of the path element */
-		unsigned i = 0;
-		while (s[i] != 0 && s[i] != '/')
-			i++;
-
-		return STRING(Cstring(s, i));
-	}
-
-	/**
-	 * Return archive user of depot-local path
-	 */
-	static User user(Path const &path) { return _path_element<User>(path, 0); }
-
-	/**
-	 * Return archive type of depot-local path
-	 *
-	 * \throw Unknown_archive_type
-	 */
-	static Type type(Path const &path)
-	{
-		typedef String<8> Name;
-		Name const name = _path_element<Name>(path, 1);
-
-		if (name == "src") return SRC;
-		if (name == "pkg") return PKG;
-		if (name == "raw") return RAW;
-
-		throw Unknown_archive_type();
-	}
-
-	static Name    name   (Path const &path) { return _path_element<Name>(path, 2); }
-	static Version version(Path const &path) { return _path_element<Name>(path, 3); }
-};
-
-
 /**
  * Collection of dependencies
  *