diff --git a/pkgs/development/libraries/qt-5/5.15/srcs.nix b/pkgs/development/libraries/qt-5/5.15/srcs.nix
index 1fe00d7e53998..21b4f55a3d5df 100644
--- a/pkgs/development/libraries/qt-5/5.15/srcs.nix
+++ b/pkgs/development/libraries/qt-5/5.15/srcs.nix
@@ -42,7 +42,7 @@ lib.mapAttrs mk (lib.importJSON ./srcs-generated.json)
       rev = "v${branchName}-lts";
     in
     {
-      version = "${branchName}-${lib.substring 0 7 rev}";
+      version = branchName;
 
       src = fetchgit {
         url = "https://github.com/qt/qtwebengine.git";