diff --git a/pkgs/applications/networking/instant-messengers/kdeltachat/default.nix b/pkgs/applications/networking/instant-messengers/kdeltachat/default.nix
new file mode 100644
index 00000000000..84b6f7ecb37
--- /dev/null
+++ b/pkgs/applications/networking/instant-messengers/kdeltachat/default.nix
@@ -0,0 +1,41 @@
+{ lib
+, mkDerivation
+, fetchFromSourcehut
+, cmake
+, extra-cmake-modules
+, pkg-config
+, kirigami2
+, libdeltachat
+, qtmultimedia
+}:
+
+mkDerivation rec {
+  pname = "kdeltachat";
+  version = "unstable-2021-05-03";
+
+  src = fetchFromSourcehut {
+    owner = "~link2xt";
+    repo = "kdeltachat";
+    rev = "dd7455764074c0864234a6a25ab6f87e8d5c3121";
+    sha256 = "1vsy2jcisvf9mndxlwif3ghv1n2gz5ycr1qh72kgski38qan621v";
+  };
+
+  nativeBuildInputs = [
+    cmake
+    extra-cmake-modules
+    pkg-config
+  ];
+
+  buildInputs = [
+    kirigami2
+    libdeltachat
+    qtmultimedia
+  ];
+
+  meta = with lib; {
+    description = "Delta Chat client using Kirigami framework";
+    homepage = "https://git.sr.ht/~link2xt/kdeltachat";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ dotlambda ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2dfc012bc48..b8b30c94a24 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -24080,6 +24080,8 @@ in
 
   kbibtex = libsForQt5.callPackage ../applications/office/kbibtex { };
 
+  kdeltachat = libsForQt5.callPackage ../applications/networking/instant-messengers/kdeltachat { };
+
   kdevelop-pg-qt = libsForQt5.callPackage ../applications/editors/kdevelop5/kdevelop-pg-qt.nix { };
 
   kdevelop-unwrapped = libsForQt5.callPackage ../applications/editors/kdevelop5/kdevelop.nix {