diff --git a/pkgs/top-level/dotnet-packages.nix b/pkgs/top-level/dotnet-packages.nix
index effdaf726c9..d357d3fdb95 100644
--- a/pkgs/top-level/dotnet-packages.nix
+++ b/pkgs/top-level/dotnet-packages.nix
@@ -178,9 +178,11 @@ let self = dotnetPackages // overrides; dotnetPackages = with self; {
     pname = "Dafny";
     version = "3.7.3";
 
-    src = fetchurl {
-      url = "https://github.com/Microsoft/dafny/archive/v${version}.tar.gz";
-      sha256 = "0w9g8smx54pvg1y5zs90awv9plgyz5nkrnqbzi9m6dymhybblvx5";
+    src = fetchFromGitHub {
+      owner = "Microsoft";
+      repo = "dafny";
+      rev = "v${version}";
+      sha256 = "1knv6zvpq0bnngmlwkcqgjpdkqsgbiihs6a0cycb8ssn18s4ippr";
     };
 
     preBuild = ''