diff --git a/pkgs/development/python-modules/jupyterlite-core/default.nix b/pkgs/development/python-modules/jupyterlite-core/default.nix
index 496717592b40..42ef3224589b 100644
--- a/pkgs/development/python-modules/jupyterlite-core/default.nix
+++ b/pkgs/development/python-modules/jupyterlite-core/default.nix
@@ -14,7 +14,7 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "jupyterlite-core";
-  version = "0.7.6";
+  version = "0.8.0";
   pyproject = true;
   __structuredAttrs = true;
 
@@ -22,7 +22,7 @@ buildPythonPackage (finalAttrs: {
     owner = "jupyterlite";
     repo = "jupyterlite";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-TSy0GUI/7NLsLOayBwZ/raTtOtFgs/t4v1ByytVG960=";
+    hash = "sha256-LERWOeOvGdefbgQxbA8GAFZq1OD/Hhl2Q9hNVCS3Et4=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/py/jupyterlite-core";
diff --git a/pkgs/development/python-modules/jupyterlite-sphinx/default.nix b/pkgs/development/python-modules/jupyterlite-sphinx/default.nix
index a4a1c68fbe41..3e0951f57541 100644
--- a/pkgs/development/python-modules/jupyterlite-sphinx/default.nix
+++ b/pkgs/development/python-modules/jupyterlite-sphinx/default.nix
@@ -59,6 +59,10 @@ buildPythonPackage (finalAttrs: {
     ];
   };
 
+  pythonRelaxDeps = [
+    "jupyterlite-core"
+  ];
+
   # upstream has no tests
   doCheck = false;