gnu: Add node-ms-bootstrap.

* gnu/packages/node.scm (node-ms-bootstrap): New variable.

gnu/packages/node.scm

@@ -31,8 +31,10 @@
   #:use-module (guix packages)
   #:use-module (guix derivations)
   #:use-module (guix download)
+  #:use-module (guix git-download)
   #:use-module (guix utils)
   #:use-module (guix build-system gnu)
+  #:use-module (guix build-system node)
   #:use-module (gnu packages)
   #:use-module (gnu packages adns)
   #:use-module (gnu packages base)
@@ -246,6 +248,34 @@ devices.")
 @uref{https://semver.org/, SemVer.org} specification.")
     (license license:isc)))
 
+(define-public node-ms-bootstrap
+  (package
+    (name "node-ms")
+    (version "2.1.2")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/vercel/ms.git")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32
+         "1pjxzbi4j8pinlsc7yxvfrh0b47kb2dc4lfc2rjq4wx5bdwl33fj"))))
+    (build-system node-build-system)
+    (arguments
+     `(#:node ,node-bootstrap
+       #:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (delete 'configure))))
+    (home-page "https://github.com/zeit/ms#readme")
+    (properties '((hidden? . #t)))
+    (synopsis "Tiny millisecond conversion utility")
+    (description "Use this package to easily convert various time
+formats to milliseconds.")
+    (license license:expat)))
+
 (define-public libnode
   (package/inherit node
     (name "libnode")