diff --git a/pkgs/by-name/ca/calibre/package.nix b/pkgs/by-name/ca/calibre/package.nix
index 0f54ac6ce4e3..459863dbeb30 100644
--- a/pkgs/by-name/ca/calibre/package.nix
+++ b/pkgs/by-name/ca/calibre/package.nix
@@ -186,9 +186,6 @@ stdenv.mkDerivation (finalAttrs: {
   installPhase = ''
     runHook preInstall
 
-    # Work around #493843 until #493988 lands on master.
-    export QMAKE="${qt6.qtbase}/bin/qmake"
-
     python setup.py install --root=$out \
       --prefix=$out \
       --libdir=$out/lib \