init.el

    (when (site-lisp-library-loadable-p 'helm-fasd)
      (load "helm-fasd"))

lib.el

  (defun site-lisp-library-loadable-p (name)
    "Return whether or not the library `name' can be loaded from a
  source file under ~/.emacs.d/site-lisp/name/"
    (let ((f (locate-library (symbol-name name))))
      (and f (string-prefix-p (file-name-as-directory (site-lisp-dir-for name)) f))))

traceback

Debugger entered--Lisp error: (wrong-type-argument symbolp "helm-fasd")
  symbol-name("helm-fasd")
  (locate-library (symbol-name name))
  (let ((f (locate-library (symbol-name name)))) (and f (string-prefix-p (file-name-as-directory (site-lisp-dir-for name)) f)))
  site-lisp-library-loadable-p("helm-fasd")
  (if (site-lisp-library-loadable-p name) nil (byte-compile-file (download-site-lisp-module name url)))
  ensure-lib-from-url("helm-fasd" "https://raw.githubusercontent.com/ajsalminen/helm-fasd/master/helm-fasd.el")
  eval-buffer(#<buffer  *load*> nil "/Users/dustinlacewell/.emacs.d/init.el" nil t)  ; Reading at buffer position 6488
  load-with-code-conversion("/Users/dustinlacewell/.emacs.d/init.el" "/Users/dustinlacewell/.emacs.d/init.el" t t)
  load("/Users/dustinlacewell/.emacs.d/init" t t)
  #[0 "\205\266	\306=\203\307\310Q\202?	\311=\204\307\312Q\202?\313\307\314\315#\203*\316\202?\313\307\314\317#\203>\320\321\322!D\nB\323\202?\316\324\325
\324\211#\210\324=\203e\326\327\330\307\331Q!\"\325
\324\211#\210\324=\203d
\210\203\247\332!\333\232\203\247\334!\211\335P\336
!\203\201\211\202\214\336!\203\213
\202\214\314\262
\203\245\337\"\203\243\340\341#\210\342\343!\210
\266\f?\205\264\314\325\344\324\211#)\262
\207" [init-file-user system-type delayed-warnings-list user-init-file inhibit-default-init inhibit-startup-screen ms-dos "~" "/_emacs" windows-nt "/.emacs" directory-files nil "^\\.emacs\\(\\.elc?\\)?$" "~/.emacs" "^_emacs\\(\\.elc?\\)?$" initialization format-message "`_emacs' init file is deprecated, please use `.emacs'" "~/_emacs" t load expand-file-name "init" file-name-as-directory "/.emacs.d" file-name-extension "elc" file-name-sans-extension ".el" file-exists-p file-newer-than-file-p message "Warning: %s is newer than %s" sit-for 1 "default"] 7]()
  command-line()
  normal-top-level()