diff --git a/modules/services/jupyter.nix b/modules/services/jupyter.nix
index 7c921bd..2ba2545 100644
--- a/modules/services/jupyter.nix
+++ b/modules/services/jupyter.nix
@@ -83,9 +83,9 @@ let
   defaultKernel = {
     python3 =
       let
-        env = (pkgs.python3.withPackages (ps: with ps; [
+        env = pkgs.python3.withPackages (ps: with ps; [
           ipykernel
-        ]));
+        ]);
       in
       {
         displayName = "Default Python kernel";
@@ -142,13 +142,13 @@ in
         {
           geospatial =
             let
-              env = (pkgs.python3.withPackages (p: with p; [
+              env = pkgs.python3.withPackages (p: with p; [
                 ipykernel
                 geopkgs.python3-gdal
                 geopkgs.python3-geopandas
                 geopkgs.python3-fiona
                 geopkgs.python3-rasterio
-              ]));
+              ]);
           in
           {
             displayName = "Geospatial Python kernel";
@@ -166,10 +166,10 @@ in
 
           other =
             let
-              env = (pkgs.python3.withPackages (p: with p; [
+              env = pkgs.python3.withPackages (p: with p; [
                 ipykernel
                 pandas
-              ]));
+              ]);
           in
           {
             displayName = "Other Python kernel";
diff --git a/tests/jupyter/geonix.nix b/tests/jupyter/geonix.nix
index 2bb9cb9..8c15c13 100644
--- a/tests/jupyter/geonix.nix
+++ b/tests/jupyter/geonix.nix
@@ -17,13 +17,13 @@ in
     kernels = {
       geospatial =
         let
-          env = (pkgs.python3.withPackages (ps: with ps; [
+          env = pkgs.python3.withPackages (ps: with ps; [
             ipykernel
             geopkgs.python3-gdal
             geopkgs.python3-geopandas
             geopkgs.python3-fiona
             geopkgs.python3-rasterio
-          ]));
+          ]);
         in
         {
           displayName = "Geospatial Python kernel";