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diff --git a/pkgs/development/tools/language-servers/vhdl-ls/default.nix b/pkgs/development/tools/language-servers/vhdl-ls/default.nix
index be42edff8eed..3499d54ce068 100644
--- a/pkgs/development/tools/language-servers/vhdl-ls/default.nix
+++ b/pkgs/development/tools/language-servers/vhdl-ls/default.nix
@@ -5,25 +5,18 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "vhdl-ls";
-  version = "0.65.0";
+  version = "0.66.0";
 
   src = fetchFromGitHub {
     owner = "VHDL-LS";
     repo = "rust_hdl";
     rev = "v${version}";
-    hash = "sha256-B+jzTrV5Kk4VOgr+5l0F5+cXzfb0aErKaiH50vIdLq4=";
+    hash = "sha256-tVeGfPm5WdZjARp7n4WD3YQzMUWA3M3TJo2oVivtkiA=";
   };
 
-  # No Cargo.lock upstream, see:
-  # https://github.com/VHDL-LS/rust_hdl/issues/166
-  cargoLock = {
-    lockFile = ./Cargo.lock;
-  };
+  cargoHash = "sha256-bXz216QvTpBuUNAi5sF0Lga+1ubjlokqPglUyAVXThg=";
+
   postPatch = ''
-    ln -s ${./Cargo.lock} Cargo.lock
-  ''
-  # Also make it look up vhdl_libraries in an expected location
-  + ''
     substituteInPlace vhdl_lang/src/config.rs \
       --replace /usr/lib $out/lib
   '';