diff --git a/config.tests/unix/arch.test b/config.tests/unix/arch.test
index 939b49cea0..3f5f153cc0 100755
--- a/config.tests/unix/arch.test
+++ b/config.tests/unix/arch.test
@@ -13,7 +13,7 @@ VARPREFIX=$6
 # build a test program but don't run it
 test -d "$OUTDIR/config.tests/arch" || mkdir -p "$OUTDIR/config.tests/arch"
 [ -f Makefile ] && $MAKE distclean >/dev/null 2>&1
-"$OUTDIR/bin/qmake" -nocache -spec "$QMKSPEC" "QT_BUILD_TREE=$OUTDIR" "LIBS+=$SYSROOT_FLAG" "QMAKE_CXXFLAGS+=$SYSROOT_FLAG" "$SRCDIR/config.tests/arch/arch.pro" -o "$OUTDIR/config.tests/arch/Makefile" >/dev/null 2>&1 || echo "qmake is broken" >&2
+OUTDIR=$OUTDIR "$OUTDIR/bin/qmake" -nocache -spec "$QMKSPEC" "QT_BUILD_TREE=$OUTDIR" "LIBS+=$SYSROOT_FLAG" "QMAKE_CXXFLAGS+=$SYSROOT_FLAG" "$SRCDIR/config.tests/arch/arch.pro" -o "$OUTDIR/config.tests/arch/Makefile" >/dev/null 2>&1 || echo "qmake is broken" >&2
 cd "$OUTDIR/config.tests/arch"