diff --git a/cuda-11.5.2-0.build.sh b/cuda-11.5.2-0.build.sh
index 630d6ca..d155c19 100755
--- a/cuda-11.5.2-0.build.sh
+++ b/cuda-11.5.2-0.build.sh
@@ -9,6 +9,7 @@ MINOR=2
 VERSION=$MAJOR.$MINOR
 BUILD=0
 DRIVERVERSION=495.29.05
+CUDAFILE=cuda_${VERSION}_${DRIVERVERSION}_linux.run
 
 CUDNNVER=8.3.3.40
 CUDNNFILE=cudnn-linux-x86_64-${CUDNNVER}_cuda$MAJOR-archive.tar.xz
@@ -59,25 +60,13 @@ BUILDDIR=$PREFIX/build
 mkdir -p $BUILDDIR
 cd $BUILDDIR
 
-### TOOLKIT ### https://developer.nvidia.com/cuda-toolkit
 
-# https://developer.download.nvidia.com/compute/cuda/11.4.0/local_installers/cuda_11.4.0_470.42.01_linux.run
-INSTALLFILE=cuda_${VERSION}_${DRIVERVERSION}_linux.run
-URL=https://developer.download.nvidia.com/compute/cuda/$VERSION/local_installers/$INSTALLFILE
-
-# in case it was downloaded before
-if [ ! -e $INSTALLFILE -a -e /package/cuda/src/$INSTALLFILE ]; then
-  cp -vp /package/cuda/src/$INSTALLFILE $INSTALLFILE
-fi
-
-if [ ! -e $INSTALLFILE ]; then
-  wget $URL
-fi
+test -e $CUDAFILE || cp -vp /package/cuda/src/$CUDAFILE .
 
 # $PREFIX/cuda_tmp_dir: this is owed to the demented cuda installer, which happily fails with
 # "Unable to write to directory: /pkg", "Permission denied. Unable to write to /pkg/cuda-11.0.3-0/" - what?
 # OTOH the installer bundles its libraries and includes a bit better than before
-bash $INSTALLFILE \
+bash $CUDAFILE \
   --installpath=$PREFIX/cuda_tmp_dir \
   --tmpdir=$TMPDIR \
   --toolkit \