diff --git a/gnu/packages/kde.scm b/gnu/packages/kde.scm
index b1b8b6a484..b832a6893c 100644
--- a/gnu/packages/kde.scm
+++ b/gnu/packages/kde.scm
@@ -41,6 +41,7 @@
   #:use-module (gnu packages algebra)
   #:use-module (gnu packages apr)
   #:use-module (gnu packages audio)
+  #:use-module (gnu packages backup)
   #:use-module (gnu packages bison)
   #:use-module (gnu packages boost)
   #:use-module (gnu packages code)
@@ -79,6 +80,74 @@
   #:use-module (gnu packages xml)
   #:use-module (gnu packages xorg))
 
+(define-public ark
+  (package
+    (name "ark")
+    ;; 20.12.0 need ECM 5.71.0, but guix extra-cmake-modules ECM is 5.70.1.
+    (version "20.04.1")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://kde/stable/release-service/" version
+                                  "/src/ark-" version ".tar.xz"))
+
+              (sha256
+               (base32
+                "0g5bfa1lc7mhrc2ngd4ldf33dpwr7gqrj95kp897pf632wwj23iw"))
+              (patches (search-patches
+                        ;; guix libarchive no support xar.
+                        "ark-skip-xar-test.patch"))))
+    (build-system qt-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'start-xserver
+           ;;; adddialogtest need DISPLAY.
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((xorg-server (assoc-ref inputs "xorg-server")))
+               (setenv "HOME" (getcwd))
+               (system (format #f "~a/bin/Xvfb :1 &" xorg-server))
+               (setenv "DISPLAY" ":1")
+               #t))))))
+    (native-inputs
+     `(("extra-cmake-modules" ,extra-cmake-modules)
+       ("pkg-config" ,pkg-config)
+       ("kdoctools" ,kdoctools)))
+    (inputs
+     `(("breeze-icons" ,breeze-icons)
+       ("karchive" ,karchive)
+       ("kconfig" ,kconfig)
+       ("kcrash" ,kcrash)
+       ("kdbusaddons" ,kdbusaddons)
+       ("khtml" ,khtml)
+       ("ki18n" ,ki18n)
+       ("kio" ,kio)
+       ("kitemmodels" ,kitemmodels)
+       ("kparts" ,kparts)
+       ("kpty" ,kpty)
+       ("kservice" ,kservice)
+       ("kwidgetsaddons" ,kwidgetsaddons)
+       ("libarchive" ,libarchive)
+       ("libzip" ,libzip)
+       ("qtbase" ,qtbase)
+       ("zlib" ,zlib)
+
+       ;; test
+       ("lz4" ,lz4)
+       ("xorg-server" ,xorg-server)))
+    (propagated-inputs
+     `(("unzip" ,unzip)
+       ("zip" ,zip)
+       ("lrzip" ,lrzip)
+       ("lzop" ,lzop)
+       ("zstd" ,zstd)
+       ("p7zip" ,p7zip)))
+    (home-page "https://apps.kde.org/en/ark")
+    (synopsis "Archiving Tool")
+    (description "Ark is a graphical file compression/decompression utility with
+ support for multiple formats, including tar, gzip, bzip2, rar and zip, as well
+as CD-ROM images.")
+    (license license:gpl2+)))
+
 (define-public baloo-widgets
   (package
     (name "baloo-widgets")
diff --git a/gnu/packages/patches/ark-skip-xar-test.patch b/gnu/packages/patches/ark-skip-xar-test.patch
new file mode 100644
index 0000000000..525201997b
--- /dev/null
+++ b/gnu/packages/patches/ark-skip-xar-test.patch
@@ -0,0 +1,44 @@
+Guix libarchive no support xar.
+
+--- ark-20.04.1.orig/autotests/kerfuffle/loadtest.cpp	2020-12-23 08:46:15.780782601 +0800
++++ ark-20.04.1/autotests/kerfuffle/loadtest.cpp	2020-12-23 11:13:17.101724042 +0800
+@@ -181,13 +181,6 @@
+         qDebug() << "lz4 executable not found in path. Skipping lz4 test.";
+     }
+ 
+-    QTest::newRow("xar archive")
+-            << QFINDTESTDATA("data/simplearchive.xar")
+-            << QStringLiteral("simplearchive")
+-            << true << false << false << false << false << 0 << Archive::Unencrypted
+-            << QStringLiteral("simplearchive")
+-            << QString();
+-
+     QTest::newRow("mimetype child of application/zip")
+             << QFINDTESTDATA("data/test.odt")
+             << QStringLiteral("test")
+--- ark-20.04.1.orig/autotests/kerfuffle/extracttest.cpp	2020-12-23 08:46:15.780782601 +0800
++++ ark-20.04.1/autotests/kerfuffle/extracttest.cpp	2020-12-23 11:14:02.801809620 +0800
+@@ -350,23 +350,6 @@
+         qDebug() << "lz4 executable not found in path. Skipping lz4 test.";
+     }
+ 
+-    archivePath = QFINDTESTDATA("data/simplearchive.xar");
+-    QTest::newRow("extract selected entries from a xar archive without path")
+-            << archivePath
+-            << QVector<Archive::Entry*> {
+-                   new Archive::Entry(this, QStringLiteral("dir1/file11.txt"), QString()),
+-                   new Archive::Entry(this, QStringLiteral("file4.txt"), QString())
+-               }
+-            << optionsNoPaths
+-            << 2;
+-
+-    archivePath = QFINDTESTDATA("data/simplearchive.xar");
+-    QTest::newRow("extract all entries from a xar archive with path")
+-            << archivePath
+-            << QVector<Archive::Entry*>()
+-            << optionsPreservePaths
+-            << 6;
+-
+     archivePath = QFINDTESTDATA("data/hello-1.0-x86_64.AppImage");
+     QTest::newRow("extract all entries from an AppImage with path")
+             << archivePath