diff --git a/pkgs/development/tools/rust/cargo-pgrx/default.nix b/pkgs/development/tools/rust/cargo-pgrx/default.nix
index 5da7f839e9b2..fdcdfee56a9a 100644
--- a/pkgs/development/tools/rust/cargo-pgrx/default.nix
+++ b/pkgs/development/tools/rust/cargo-pgrx/default.nix
@@ -24,6 +24,7 @@ let
         inherit version pname hash;
       };
 
+      useFetchCargoVendor = true;
       inherit cargoHash;
 
       nativeBuildInputs = [
@@ -60,19 +61,19 @@ in
   cargo-pgrx_0_12_0_alpha_1 = generic {
     version = "0.12.0-alpha.1";
     hash = "sha256-0m9oaqjU42RYyttkTihADDrRMjr2WoK/8sInZALeHws=";
-    cargoHash = "sha256-9XTIcpoCnROP63ZTDgMMMmj0kPggiTazKlKQfCgXKzk=";
+    cargoHash = "sha256-zYjqE7LZLnTaVxWAPWC1ncEjCMlrhy4THtgecB7wBYY=";
   };
 
   cargo-pgrx_0_12_5 = generic {
     version = "0.12.5";
     hash = "sha256-U2kF+qjQwMTaocv5f4p5y3qmPUsTzdvAp8mz9cn/COw=";
-    cargoHash = "sha256-nEgIOBGNG3TupA55/TgoXDPeJzjBjOGGfK+WjrH06VY=";
+    cargoHash = "sha256-CycwWvxYrHj7lmTiiNC1WdbFgrdlGr/M3qTN/N+7xQA=";
   };
 
   cargo-pgrx_0_12_6 = generic {
     version = "0.12.6";
     hash = "sha256-7aQkrApALZe6EoQGVShGBj0UIATnfOy2DytFj9IWdEA=";
-    cargoHash = "sha256-Di4UldQwAt3xVyvgQT1gUhdvYUVp7n/a72pnX45kP0w=";
+    cargoHash = "sha256-pnMxWWfvr1/AEp8DvG4awig8zjdHizJHoZ5RJA8CL08=";
   };
 
 }