gnu: arc-theme: Move to gnome-xyz.

* gnu/packages/gnome.scm (arc-theme): Move from here...
* gnu/packages/gnome-xyz.scm (arc-theme): ... to here.

gnu/packages/gnome-xyz.scm

@@ -33,12 +33,15 @@
   #:use-module (guix git-download)
   #:use-module (guix packages)
   #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (gnu packages autotools)
   #:use-module (gnu packages base)
   #:use-module (gnu packages bash)
   #:use-module (gnu packages gettext)
   #:use-module (gnu packages glib)
   #:use-module (gnu packages gnome)
   #:use-module (gnu packages gtk)
+  #:use-module (gnu packages inkscape)
+  #:use-module (gnu packages image)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages python-xyz)
   #:use-module (gnu packages ssh)
@@ -518,6 +521,50 @@ scrollable tiling of windows and per monitor workspaces.  It's inspired by paper
 notebooks and tiling window managers.")
     (license license:gpl3)))
 
+(define-public arc-theme
+  (package
+    (name "arc-theme")
+    (version "20201013")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/jnsh/arc-theme")
+                    (commit version)))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "1x2l1mwjx68dwf3jb1i90c1q8nqsl1wf2zggcn8im6590k5yv39s"))))
+    (build-system gnu-build-system)
+    (arguments
+     '(#:configure-flags
+       (list "--disable-cinnamon")
+       #:phases
+       (modify-phases %standard-phases
+         ;; autogen.sh calls configure at the end of the script.
+         (replace 'bootstrap
+           (lambda _ (invoke "autoreconf" "-vfi")))
+         (add-before 'build 'set-home   ;placate Inkscape
+           (lambda _
+             (setenv "HOME" (getcwd))
+             #t)))))
+    (native-inputs
+     `(("autoconf" ,autoconf)
+       ("automake" ,automake)
+       ("glib" ,glib "bin")             ; for glib-compile-resources
+       ("gnome-shell" ,gnome-shell)
+       ("gtk+" ,gtk+)
+       ("inkscape" ,inkscape)
+       ("optipng" ,optipng)
+       ("pkg-config" ,pkg-config)
+       ("sassc" ,sassc/libsass-3.5)))
+    (synopsis "A flat GTK+ theme with transparent elements")
+    (description "Arc is a flat theme with transparent elements for GTK 3, GTK
+2, and GNOME Shell which supports GTK 3 and GTK 2 based desktop environments
+like GNOME, Unity, Budgie, Pantheon, XFCE, Mate, etc.")
+    (home-page "https://github.com/horst3180/arc-theme")
+    ;; No "or later" language found.
+    (license license:gpl3+)))
+
 (define-public greybird-gtk-theme
   (package
     (name "greybird-gtk-theme")

gnu/packages/gnome.scm

@@ -9570,50 +9570,6 @@ functionality and behavior.")
     (home-page "https://extensions.gnome.org/")
     (license license:gpl3+)))
 
-(define-public arc-theme
-  (package
-    (name "arc-theme")
-    (version "20201013")
-    (source (origin
-              (method git-fetch)
-              (uri (git-reference
-                    (url "https://github.com/jnsh/arc-theme")
-                    (commit version)))
-              (file-name (git-file-name name version))
-              (sha256
-               (base32
-                "1x2l1mwjx68dwf3jb1i90c1q8nqsl1wf2zggcn8im6590k5yv39s"))))
-    (build-system gnu-build-system)
-    (arguments
-     '(#:configure-flags
-       (list "--disable-cinnamon")
-       #:phases
-       (modify-phases %standard-phases
-         ;; autogen.sh calls configure at the end of the script.
-         (replace 'bootstrap
-           (lambda _ (invoke "autoreconf" "-vfi")))
-         (add-before 'build 'set-home   ;placate Inkscape
-           (lambda _
-             (setenv "HOME" (getcwd))
-             #t)))))
-    (native-inputs
-     `(("autoconf" ,autoconf)
-       ("automake" ,automake)
-       ("glib" ,glib "bin")             ; for glib-compile-resources
-       ("gnome-shell" ,gnome-shell)
-       ("gtk+" ,gtk+)
-       ("inkscape" ,inkscape)
-       ("optipng" ,optipng)
-       ("pkg-config" ,pkg-config)
-       ("sassc" ,sassc/libsass-3.5)))
-    (synopsis "A flat GTK+ theme with transparent elements")
-    (description "Arc is a flat theme with transparent elements for GTK 3, GTK
-2, and GNOME Shell which supports GTK 3 and GTK 2 based desktop environments
-like GNOME, Unity, Budgie, Pantheon, XFCE, Mate, etc.")
-    (home-page "https://github.com/horst3180/arc-theme")
-    ;; No "or later" language found.
-    (license license:gpl3+)))
-
 (define-public faba-icon-theme
   (package
     (name "faba-icon-theme")