gnu: Add emacs-nano-theme.

* gnu/packages/emacs-xyz.scm (emacs-nano-theme): New variable.

Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Change-Id: Idbaa1dffbbc6e5bc4e31540d4a6816dcb4ea63f3

gnu/packages/emacs-xyz.scm

@@ -9380,6 +9380,30 @@ a file).")
 package namespace prefix is ​​hidden by a colon.")
     (license license:gpl2+)))
 
+(define-public emacs-nano-theme
+  ;; No named branches.
+  (let ((commit "ffe414c8af9c673caf8b8b05ba89a229cb9ad48b")
+        (revision "0"))
+    (package
+      (name "emacs-nano-theme")
+      (version (git-version "0.3.4" revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/rougier/nano-theme")
+                      (commit commit)))
+                (file-name (git-file-name name version))
+                (sha256
+                 (base32
+                  "0wi5snsakpag7lcdndz10x5fxb0yrnignqdx3v4fm5drbk0d7hkr"))))
+      (build-system emacs-build-system)
+      (home-page "https://github.com/rougier/nano-theme")
+      (synopsis "GNU Emacs / N Λ N O Theme")
+      (description
+       "Nano is a consistent theme for GNU Emacs which is based on Material
+colors and the dark theme is based on Nord colors.")
+      (license license:gpl3+))))
+
 (define-public emacs-evil-leader
   (package
     (name "emacs-evil-leader")