diff --git a/pkgs/by-name/ta/taskflow/package.nix b/pkgs/by-name/ta/taskflow/package.nix
index 293529da8fb9..cfe18e3c20a6 100644
--- a/pkgs/by-name/ta/taskflow/package.nix
+++ b/pkgs/by-name/ta/taskflow/package.nix
@@ -36,6 +36,8 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   cmakeFlags = [
+    # FIXME remove once Taskflow is updated to 4.0.0
+    (lib.cmakeFeature "CMAKE_CXX_STANDARD" "20")
     # building the tests implies running them in the buildPhase
     (lib.cmakeBool "TF_BUILD_TESTS" finalAttrs.finalPackage.doCheck)
   ];