ticker: fix version set at buildtime (#391684)

pkgs/by-name/ti/ticker/package.nix

@@ -2,6 +2,8 @@
   lib,
   buildGoModule,
   fetchFromGitHub,
+  ticker,
+  testers,
 }:
 
 buildGoModule rec {
@@ -20,12 +22,18 @@ buildGoModule rec {
   ldflags = [
     "-s"
     "-w"
-    "-X github.com/achannarasappa/ticker/cmd.Version=v${version}"
+    "-X github.com/achannarasappa/ticker/v4/cmd.Version=${version}"
   ];
 
   # Tests require internet
   doCheck = false;
 
+  passthru.tests.version = testers.testVersion {
+    package = ticker;
+    command = "ticker --version";
+    inherit version;
+  };
+
   meta = with lib; {
     description = "Terminal stock ticker with live updates and position tracking";
     homepage = "https://github.com/achannarasappa/ticker";