diff --git a/flake.nix b/flake.nix
index 06bc714..17b4c3d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -110,31 +110,7 @@
             };
           };
 
-          terraformProviders = let
-            terraform-providers = pkgs.terraform-providers.actualProviders;
-          in
-            lib.mapAttrs
-            (
-              _: provider:
-                if provider ? override
-                then
-                  # use opentofu plugin registry over terraform's
-                  provider.override (oldArgs: {
-                    provider-source-address =
-                      lib.replaceStrings ["https://registry.terraform.io/providers"] [
-                        "registry.opentofu.org"
-                      ]
-                      oldArgs.homepage;
-                  })
-                else provider
-            )
-            (
-              removeAttrs terraform-providers [
-                "override"
-                "overrideDerivation"
-                "recurseForDerivations"
-              ]
-            );
+          terraformProviders = pkgs.terraform-providers.actualProviders;
 
           getRelease = terraform: pkgs.runCommand "release-tarball"
             {
@@ -212,28 +188,6 @@
             (name: p: (generateSchema terraform) (_: { ${name} = p; }))
             terraformProviders;
 
-          mkDevShell = terraform:
-            args: pkgs.mkShell {
-              buildInputs = lib.attrValues
-                (pkgs.callPackage ./nix/devshell.nix
-                  {
-                    generateSchema = generateSchema terraform;
-                    nickel = inputs.nickel.packages.${system}.nickel-lang-cli;
-                    inherit terraform;
-                  }
-                  args) ++ [
-                inputs.nickel.packages.${system}.default
-                inputs.topiary.packages.${system}.default
-              ];
-              shellHook = ''
-                cat <<EOF
-                  * Use 'link-schema' to produce 'tf-ncl-schema.ncl'
-                  * Use 'run-nickel' to evaluate 'main.ncl' to a Terraform deployment
-                  * Use 'run-terraform' to first evaluate 'main.ncl' and then run Terraform on the result
-                EOF
-              '';
-            };
-
           getDevShell = terraform: pkgs.mkShell {
             inputsFrom = builtins.attrValues (getChecks terraform);
             buildInputs = [ terraform ] ++ (with pkgs; [
@@ -269,9 +223,27 @@
           checks = getChecks tf.opentofu;
 
           lib = {
-            mkDevShell-terraform = mkDevShell tf.terraform;
-            mkDevShell-opentofu = mkDevShell tf.opentofu;
-            mkDevShell = mkDevShell tf.opentofu;
+            mkDevShell = { terraform ? tf.opentofu }:
+              args: pkgs.mkShell {
+                buildInputs = lib.attrValues
+                  (pkgs.callPackage ./nix/devshell.nix
+                    {
+                      generateSchema = generateSchema terraform;
+                      nickel = inputs.nickel.packages.${system}.nickel-lang-cli;
+                      inherit terraform;
+                    }
+                    args) ++ [
+                  inputs.nickel.packages.${system}.default
+                  inputs.topiary.packages.${system}.default
+                ];
+                shellHook = ''
+                  cat <<EOF
+                    * Use 'link-schema' to produce 'tf-ncl-schema.ncl'
+                    * Use 'run-nickel' to evaluate 'main.ncl' to a Terraform deployment
+                    * Use 'run-terraform' to first evaluate 'main.ncl' and then run Terraform on the result
+                  EOF
+                '';
+              };
           };
 
           devShells = rec {