diff --git a/dotnet.nix b/dotnet.nix
index 59aa796..3018469 100644
--- a/dotnet.nix
+++ b/dotnet.nix
@@ -5,7 +5,5 @@ let
   pkgs = import (fetchTarball "channel:nixpkgs-unstable") { };
 in pkgs.mkShell {
   buildInputs = [ pkgs.dotnet-sdk_9 ];
-  shellHook = ''
-    exec zsh
-  '';
+  shellHook = "";
 }
diff --git a/rust-nightly.nix b/rust-nightly.nix
index 865c0d4..83f6991 100644
--- a/rust-nightly.nix
+++ b/rust-nightly.nix
@@ -9,7 +9,5 @@ stdenv.mkDerivation {
     # to use the latest nightly:
     nixpkgs.latest.rustChannels.nightly.rust
   ];
-  shellHook = ''
-    exec zsh
-  '';
+  shellHook = "";
 }
diff --git a/rust.nix b/rust.nix
index cc2cd8b..e2da27a 100644
--- a/rust.nix
+++ b/rust.nix
@@ -5,7 +5,5 @@ let
   pkgs = import (fetchTarball "channel:nixpkgs-unstable") { };
 in pkgs.mkShell {
   buildInputs = [ pkgs.cargo pkgs.rustc pkgs.zsh pkgs.bacon ];
-  shellHook = ''
-    exec zsh
-  '';
+  shellHook = "";
 }