python3.pkgs.bqscales: relax build dependencies

pkgs/development/python-modules/bqscales/default.nix

@@ -13,7 +13,6 @@
 buildPythonPackage rec {
   pname = "bqscales";
   version = "0.3.1";
-
   format = "pyproject";
   disabled = pythonOlder "3.6";
 
@@ -22,6 +21,19 @@ buildPythonPackage rec {
     hash = "sha256-C+/GLpqYpePngbn5W0MwvpdmVgFZF7aGHyKMgO5XM90=";
   };
 
+  # We relax dependencies here instead of pulling in a patch because upstream
+  # has released a new version using hatch-jupyter-builder, but it is not yet
+  # trivial to upgrade to that.
+  #
+  # Per https://github.com/bqplot/bqscales/issues/76, jupyterlab is not needed
+  # as a build dependency right now.
+  #
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace '"jupyterlab==3.*",' "" \
+      --replace 'jupyter_packaging~=' 'jupyter_packaging>='
+  '';
+
   nativeBuildInputs = [
     hatchling
     jupyter-packaging