diff --git a/README.md b/README.md
index 9aa46c7..ef094a2 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ it is converted to an attribute set equivalent to `{ root = theArg; }`.
 | `cargoTestCommands` | The commands to run in the `checkPhase`. Default: `[ ''cargo $cargo_options test $cargo_test_options'' ]` |
 | `cargoTestOptions` | baaaar Default: `[ "$cargo_release" ''-j "$NIX_BUILD_CORES"'' ]` |
 | `buildInputs` | Extra `buildInputs` to all derivations. Default: `[]` |
-| `cargoOptions` | Options passed to cargo before the command (cargo OPTIONS <cmd>) used by the default cargoBuild Default: `[ "--locked" "-Z" "unstable-options" ]` |
+| `cargoOptions` | Options passed to cargo before the command (cargo OPTIONS <cmd>) used by the default cargoBuild Default: `[ "-Z" "unstable-options" ]` |
 | `doDoc` | When true, `cargo doc` is run and a new output `doc` is generated. Default: `false` |
 | `release` | When true, all cargo builds are run with `--release`. sets cargo_release Default: `true` |
 | `override` | An override for all derivations involved in the build. Default: `(x: x)` |
diff --git a/config.nix b/config.nix
index dd8cc90..53b47ff 100644
--- a/config.nix
+++ b/config.nix
@@ -47,7 +47,7 @@ let
       # Options passed to cargo before the command (cargo OPTIONS <cmd>)
       # used by the default cargoBuild
       cargoOptions =
-        allowFun attrs0 "cargoOptions" [ "--locked" "-Z" "unstable-options" ];
+        allowFun attrs0 "cargoOptions" [ "-Z" "unstable-options" ];
 
       # When true, `cargo doc` is run and a new output `doc` is generated.
       doDoc = attrs0.doDoc or false;
diff --git a/test.nix b/test.nix
index 11a8f30..6ec59a1 100644
--- a/test.nix
+++ b/test.nix
@@ -110,11 +110,7 @@ rec
       doDoc = true;
     };
 
-  simple-dep-patched = naersk.buildPackage
-    { root = ./test/simple-dep-patched;
-      # TODO: the lockfile needs to be regenerated
-      cargoOptions = builtins.filter (x: x != "--locked");
-    };
+  simple-dep-patched = ./test/simple-dep-patched;
 
   dummyfication = naersk.buildPackage ./test/dummyfication;
   dummyfication_test = pkgs.runCommand
@@ -124,12 +120,12 @@ rec
 
   git-dep = naersk.buildPackage {
     root = ./test/git-dep;
-    cargoOptions = [ "--locked" ];
+    cargoOptions = (opts: opts ++ [ "--locked" ]);
   };
 
   git-dep-dup = naersk.buildPackage {
     root = ./test/git-dep-dup;
-    cargoOptions = [ "--locked" ];
+    cargoOptions = (opts: opts ++ [ "--locked" ]);
   };
 
   cargo-wildcard = naersk.buildPackage ./test/cargo-wildcard;