diff --git a/pkgs/development/compilers/dotnet/update.nix b/pkgs/development/compilers/dotnet/update.nix
index 5a44b1d9133f..2a91d1fcfddc 100644
--- a/pkgs/development/compilers/dotnet/update.nix
+++ b/pkgs/development/compilers/dotnet/update.nix
@@ -18,7 +18,7 @@
 }:
 
 let
-  inherit (lib.importJSON releaseManifestFile) channel release;
+  inherit (lib.importJSON releaseManifestFile) channel tag;
 
   pkg = stdenvNoCC.mkDerivation {
     name = "update-dotnet-vmr-env";
@@ -96,9 +96,8 @@ writeScript "update-dotnet-vmr.sh" ''
       cd "$tmp"
 
       curl -fsSL "$releaseUrl" -o release.json
-      release=$(jq -r .release release.json)
 
-      if [[ -z $tag && "$release" == "${release}" ]]; then
+      if [[ -z $tag && "$tagName" == "${tag}" ]]; then
           >&2 echo "release is already $release"
           exit
       fi