diff --git a/pkgs/development/libraries/qt-6/hooks/qtbase-setup-hook.sh b/pkgs/development/libraries/qt-6/hooks/qtbase-setup-hook.sh
index 16d9f31dbadf..f0fa226e06ae 100644
--- a/pkgs/development/libraries/qt-6/hooks/qtbase-setup-hook.sh
+++ b/pkgs/development/libraries/qt-6/hooks/qtbase-setup-hook.sh
@@ -1,13 +1,13 @@
 if [[ -n "${__nix_qtbase-}" ]]; then
     # Throw an error if a different version of Qt was already set up.
-    if [[ "$__nix_qtbase" != "@dev@" ]]; then
+    if [[ "$__nix_qtbase" != "@out@" ]]; then
         echo >&2 "Error: detected mismatched Qt dependencies:"
-        echo >&2 "    @dev@"
+        echo >&2 "    @out@"
         echo >&2 "    $__nix_qtbase"
         exit 1
     fi
 else # Only set up Qt once.
-    __nix_qtbase="@dev@"
+    __nix_qtbase="@out@"
 
     qtPluginPrefix=@qtPluginPrefix@
     qtQmlPrefix=@qtQmlPrefix@
@@ -30,7 +30,7 @@ else # Only set up Qt once.
     fi
 
     # Build tools are often confused if QMAKE is unset.
-    export QMAKE=@dev@/bin/qmake
+    export QMAKE=@out@/bin/qmake
 
     export QMAKEPATH=
 
diff --git a/pkgs/development/libraries/qt-6/qt-env.nix b/pkgs/development/libraries/qt-6/qt-env.nix
index 0b41f0c07351..0202783a9d8e 100644
--- a/pkgs/development/libraries/qt-6/qt-env.nix
+++ b/pkgs/development/libraries/qt-6/qt-env.nix
@@ -9,7 +9,7 @@ buildEnv {
 
   postBuild = ''
     rm "$out/bin/qmake"
-    cp "${qtbase.dev}/bin/qmake" "$out/bin"
+    cp "${qtbase}/bin/qmake" "$out/bin"
     cat >"$out/bin/qt.conf" <<EOF
     [Paths]
     Prefix = $out