I was wondering, could somebody talk me through how the Plugins package works with a Cabal sandbox, or Cabal in general? Basically, I'm writing a program where I want to dynamically load and run user-supplied code. There are two cabal DBs in question: the sandbox which I'm using to build my program, and my "global" sandbox located in /home/user/.cabal. Which database, if either, does a program I load with System.Plugins.Load.load have access to via "import" statements? How can I avoid double-loading of packages? In particular, I'm currently getting this error when I try to load my code. Any thoughts? GHCi runtime linker: fatal error: I found a duplicate definition for symbol transformerszm0zi3zi0zi0_ControlziMonadziTransziError_mapErrorT1_closure whilst processing object file /home/joey/.cabal/lib/transformers-0.3.0.0/ghc-7.6.3/HStransformers-0.3.0.0.o This could be caused by: * Loading two different object files which export the same symbol * Specifying the same object file twice on the GHCi command line * An incorrect `package.conf' entry, causing some object to be loaded twice. GHCi cannot safely continue in this situation. Exiting now. Sorry.