diff --git a/Mk/bsd.port.mk b/Mk/bsd.port.mk
--- a/Mk/bsd.port.mk
+++ b/Mk/bsd.port.mk
@@ -5242,6 +5242,21 @@
 	@${ECHO_MSG} ""
 .    endif # pretty-print-config
 
+APPSTREAM_GENERATOR_CMD?=	appstream-generator
+APPSTREAM_GENERATOR_WORKSPACE?=	${WRKDIR}/appstream-generator-workspace
+APPSTREAM_GENERATOR_ARGS=	process-file default default ${WRKDIR}
+appstream: stage ${WRKDIR_PKGFILE}
+	@${MKDIR} ${APPSTREAM_GENERATOR_WORKSPACE}
+	${SED} -e 's|%%APPSTREAM_ARCHIVE_ROOT%%|/var/empty|g' \
+		-e 's|%%APPSTREAM_MEDIA_BASE%%|http://example.com|g' \
+		-e 's|%%APPSTREAM_HTML_BASE%%|http://example.com|g' \
+		-e 's|%%APPSTREAM_SUITE%%|default|g' \
+		-e 's|%%ARCH%%|${ARCH}|g' \
+		${TEMPLATES}/asgen-config.json \
+		> ${APPSTREAM_GENERATOR_WORKSPACE}/asgen-config.json
+	${APPSTREAM_GENERATOR_CMD} -w ${APPSTREAM_GENERATOR_WORKSPACE} ${APPSTREAM_GENERATOR_ARGS}
+	@${ECHO_CMD} "===> AppStream metadata put into ${APPSTREAM_GENERATOR_WORKSPACE}/export"
+
 desktop-categories:
 	@${SETENV} \
 			dp_CATEGORIES="${CATEGORIES}" \
diff --git a/Templates/asgen-config.json b/Templates/asgen-config.json
new file mode 100644
--- /dev/null
+++ b/Templates/asgen-config.json
@@ -0,0 +1,16 @@
+{
+  "ProjectName": "FreeBSD",
+  "ArchiveRoot": "%%APPSTREAM_ARCHIVE_ROOT%%",
+  "MediaBaseUrl": "%%APPSTREAM_MEDIA_BASE%%",
+  "HtmlBaseUrl": "%%APPSTREAM_HTML_BASE%%",
+  "MetadataType": "XML",
+  "Backend": "freebsd",
+  "Suites":
+  {
+    "%%APPSTREAM_SUITE%%":
+    {
+      "sections": ["default"],
+      "architectures": ["%%ARCH%%"]
+    }
+  }
+}