Fix PATH modified even if bin/ dir doesn't exist

scripts/datalad.sh

@@ -31,8 +31,6 @@ datalad --version >/dev/null 2>&1 || install_datalad
 exit_on_error_code "Failed to install datalad requirements: pip install"
 
 # Add bin to PATH
-pushd bin/ >/dev/null
-export PATH="${PATH}:${PWD}"
-popd >/dev/null
+[[ -d "$(realpath bin/)" ]] && export PATH="${PATH}:$(realpath bin)"
 
 datalad "$@"