diff --git a/pkgs/applications/office/calligra/default.nix b/pkgs/applications/office/calligra/default.nix
index bec19d675cb0..1537dd9b03ff 100644
--- a/pkgs/applications/office/calligra/default.nix
+++ b/pkgs/applications/office/calligra/default.nix
@@ -1,5 +1,5 @@
 {
-  mkDerivation, lib, fetchurl, extra-cmake-modules, kdoctools, makeWrapper,
+  mkDerivation, lib, fetchurl, fetchpatch, extra-cmake-modules, kdoctools, makeWrapper,
   boost, qtwebkit, qtx11extras, shared_mime_info,
   breeze-icons, kactivities, karchive, kcodecs, kcompletion, kconfig, kconfigwidgets,
   kcoreaddons, kdbusaddons, kdiagram, kguiaddons, khtml, ki18n,
@@ -23,6 +23,16 @@ mkDerivation rec {
     sha256 = "1cjdd7sx1zhas6lhw0dzhrnki790jkf93f88wn6z9yrww32dsas5";
   };
 
+  enableParallelBuilding = true;
+
+  patches = [
+    (fetchpatch {
+      name = "calligra-build-with-newer-kcalcore.patch";
+      url = "https://github.com/KDE/calligra/commit/9a02a545e8606aa91aff2038da137226a9432e1a.diff";
+      sha256 = "08xays41v6rfnc31vixf4vbz8zmi2x5lfnk7f82bm4sgmpgfxwa0";
+    })
+  ];
+
   nativeBuildInputs = [ extra-cmake-modules kdoctools makeWrapper ];
 
   buildInputs = [