diff --git a/tvix/default.nix b/tvix/default.nix
index 7225bfb89..23ce0592c 100644
--- a/tvix/default.nix
+++ b/tvix/default.nix
@@ -7,4 +7,24 @@
     inherit pkgs;
     nixpkgs = pkgs.path;
   };
+
+  # Provide a shell for the combined dependencies of all Tvix Rust
+  # projects. Note that as this is manually maintained it may be
+  # lacking something, but it is required for some people's workflows.
+  #
+  # This shell can be entered with e.g. `mg shell //tvix:shell`.
+  shell = pkgs.mkShell {
+    name = "tvix-rust-dev-env";
+    packages = [
+      pkgs.buf-language-server
+      pkgs.cargo
+      pkgs.clippy
+      pkgs.rust-analyzer
+      pkgs.rustc
+      pkgs.rustfmt
+      pkgs.protobuf
+    ];
+  };
+
+  meta.ci.targets = [ "shell" ];
 }
diff --git a/tvix/shell.nix b/tvix/shell.nix
deleted file mode 100644
index e8d1e5e38..000000000
--- a/tvix/shell.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-{ depot ? import ../. { }
-, pkgs ? depot.third_party.nixpkgs
-, ...
-}:
-
-pkgs.mkShell {
-  name = "tvix-eval-dev-env";
-  packages = [
-    pkgs.buf-language-server
-    pkgs.cargo
-    pkgs.clippy
-    pkgs.rust-analyzer
-    pkgs.rustc
-    pkgs.rustfmt
-    pkgs.protobuf
-  ];
-}