diff --git a/pkgs/development/python-modules/fastcore/default.nix b/pkgs/development/python-modules/fastcore/default.nix
index 920c03bea751..f5bda3a9f043 100644
--- a/pkgs/development/python-modules/fastcore/default.nix
+++ b/pkgs/development/python-modules/fastcore/default.nix
@@ -9,7 +9,7 @@
 
 buildPythonPackage rec {
   pname = "fastcore";
-  version = "1.8.7";
+  version = "1.8.8";
   pyproject = true;
 
   disabled = pythonOlder "3.8";
@@ -18,7 +18,7 @@ buildPythonPackage rec {
     owner = "fastai";
     repo = "fastcore";
     tag = version;
-    hash = "sha256-CF6bODkD1ooIWK4AnOXXKOKyu09cQP876BXgoGtGoXk=";
+    hash = "sha256-If/XiGAjDDVKOh7JKHENdY5pmBxlOuQ+4bZ0Gh8PBMQ=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/nbdev/default.nix b/pkgs/development/python-modules/nbdev/default.nix
index 6a582a67d6c8..55ee21da9349 100644
--- a/pkgs/development/python-modules/nbdev/default.nix
+++ b/pkgs/development/python-modules/nbdev/default.nix
@@ -1,5 +1,6 @@
 {
   lib,
+  build,
   buildPythonPackage,
   fetchPypi,
   setuptools,
@@ -27,7 +28,10 @@ buildPythonPackage rec {
 
   pythonRelaxDeps = [ "ipywidgets" ];
 
-  build-system = [ setuptools ];
+  build-system = [
+    build
+    setuptools
+  ];
 
   dependencies = [
     astunparse