diff --git a/pkgs/development/libraries/qscintilla/default.nix b/pkgs/development/libraries/qscintilla/default.nix
index 3ac9899bc498..83df3a1fcddd 100644
--- a/pkgs/development/libraries/qscintilla/default.nix
+++ b/pkgs/development/libraries/qscintilla/default.nix
@@ -1,6 +1,7 @@
 {
-  stdenv,
   lib,
+  stdenv,
+
   fetchurl,
   unzip,
   qtbase,
@@ -9,8 +10,11 @@
   fixDarwinDylibNames,
 }:
 
+let
+  qtVersion = lib.versions.major qtbase.version;
+in
 stdenv.mkDerivation (finalAttrs: {
-  pname = "qscintilla-qt5";
+  pname = "qscintilla-qt${qtVersion}";
   version = "2.14.1";
 
   src = fetchurl {
@@ -34,7 +38,6 @@ stdenv.mkDerivation (finalAttrs: {
   postFixup =
     let
       libExt = stdenv.hostPlatform.extensions.sharedLibrary;
-      qtVersion = lib.versions.major qtbase.version;
     in
     ''
       ln -s $out/lib/libqscintilla2_qt${qtVersion}${libExt} $out/lib/libqscintilla2${libExt}