diff --git a/flake.nix b/flake.nix
index a112eda..3de25d3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -17,6 +17,7 @@
             pkgs.convco
             pkgs.nodePackages.prettier
             pkgs.nixfmt
+            pkgs.jq
           ];
         };
       });
diff --git a/scripts/release.sh b/scripts/release.sh
index e50ff21..6cc26bf 100755
--- a/scripts/release.sh
+++ b/scripts/release.sh
@@ -6,20 +6,28 @@ cd $(dirname $0)/..
 # Verify the input.
 if [ "x$NUGET_TOKEN" = "x" ]
 then
-    echo "The environment variable NUGET_TOKEN is not defined"
+    echo "the environment variable NUGET_TOKEN is not defined"
     exit 1
 fi
 
 if [ "x$NUGET_PUSH_URL" = "x" ]
 then
-    echo "The environment variable NUGET_PUSH_URL is not defined"
+    echo "the environment variable NUGET_PUSH_URL is not defined"
     exit 1
 fi
 
 # Clean up everything from the previous runs.
 dotnet clean
+
 # Version the file based on the Git repository.
 (cd src && dotnet dotnet-gitversion /updateprojectfiles)
+SEMVER="v$(dotnet gitversion /output json | jq -r .SemVer)"
+
+if [ "x$SEMVER" = "x" ]
+then
+  echo "cannot figure out the semantic version"
+  exit 1
+fi
 
 # Build to pick up the new version.
 dotnet build
@@ -27,3 +35,13 @@ dotnet build
 # Create and publish the NuGet packages.
 dotnet pack --include-symbols --include-source
 dotnet nuget push src/*/bin/Debug/*.nupkg --api-key $NUGET_TOKEN --source $NUGET_PUSH_URL
+
+# Tag and push, but only if we don't have a tag.
+if ! git tag | grep $SEMVER >& /dev/null
+then
+  echo "tagging and pushing"
+  git tag $SEMVER
+  git push origin $SEMVER
+else
+  echo "not tagging, already exists"
+fi