diff --git a/README.org b/README.org
index 8b00390..4640b87 100644
--- a/README.org
+++ b/README.org
@@ -192,7 +192,7 @@ with pkgs;
 
 let
   nixBin = writeShellScriptBin "nix" ''
-    ${nixFlakes}/bin/nix --option experimental-features "nix-command flakes" "$@"
+    exec ${nixFlakes}/bin/nix --option experimental-features "nix-command flakes" "$@"
   '';
 
 in mkShell {
diff --git a/shell.nix b/shell.nix
index a5ce9d8..3aa61b0 100644
--- a/shell.nix
+++ b/shell.nix
@@ -5,7 +5,7 @@ with pkgs;
 
 let
   nixBin = writeShellScriptBin "nix" ''
-    ${nixFlakes}/bin/nix --option experimental-features "nix-command flakes" "$@"
+    exec ${nixFlakes}/bin/nix --option experimental-features "nix-command flakes" "$@"
   '';
 
 in mkShell {