* (ql:quickload :tcod)
To load "tcod":
  Load 1 ASDF system:
    tcod
; Loading "tcod"

debugger invoked on a LOAD-FOREIGN-LIBRARY-ERROR in thread
#<THREAD "main thread" RUNNING {10010B0523}>:
  Unable to load any of the alternatives:
   ("libffi-7.dll" "libffi-6.dll" "libffi-5.dll" "libffi.dll")

Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [RETRY                        ] Try loading the foreign library again.
  1: [USE-VALUE                    ] Use another library instead.
  2: [TRY-RECOMPILING              ] Recompile libffi and try loading it again
  3: [RETRY                        ] Retry
                                     loading FASL for #<CL-SOURCE-FILE "cffi-libffi" "libffi" "libffi">.
  4: [ACCEPT                       ] Continue, treating
                                     loading FASL for #<CL-SOURCE-FILE "cffi-libffi" "libffi" "libffi">
                                     as having been successful.
  5:                                 Retry ASDF operation.
  6: [CLEAR-CONFIGURATION-AND-RETRY] Retry ASDF operation after resetting the
                                     configuration.
  7:                                 Retry ASDF operation.
  8:                                 Retry ASDF operation after resetting the
                                     configuration.
  9: [ABORT                        ] Give up on "tcod"
 10:                                 Exit debugger, returning to top level.

(FL-ERROR "Unable to load any of the alternatives:~%   ~S" ("libffi-7.dll" "libffi-6.dll" "libffi-5.dll" "libffi.dll"))
   source: (ERROR 'LOAD-FOREIGN-LIBRARY-ERROR :FORMAT-CONTROL CONTROL
                  :FORMAT-ARGUMENTS ARGUMENTS)
0]