Plugin recompilation check fails when profiling is enabled

When compiling with profiling enabled and using a plugin, GHC will panic as follows:

ghc: panic! (the 'impossible' happened)
  (GHC version 8.6.1.20180803 for x86_64-unknown-linux):
        mkPluginUsage: no dylibs
  GraphMod
  Call stack:
      CallStack (from HasCallStack):
        callStackDoc, called at compiler/utils/Outputable.hs:1164:37 in ghc:Outputable
        pprPanic, called at compiler/deSugar/DsUsage.hs:178:15 in ghc:DsUsage

Investigating determines that the following paths are being inspected:

/nix/store/m0ylnbifx5ba1qwi8vzipxq4p7ma3073-graphmod-plugin-0.1.0.0/lib/ghc-8.6.1.20180803/x86_64-linux-ghc-8.6.1.20180803/libHSgraphmod-plugin-0.1.0.0-3YjHj1EtcCZGtpEicyDU7w_p-ghc8.6.1.20180803.so

/nix/store/q8rg4mca5zqv98arpxd7164pqa72hf1n-ncurses-6.1/lib/libHSgraphmod-plugin-0.1.0.0-3YjHj1EtcCZGtpEicyDU7w_p-ghc8.6.1.20180803.so

/nix/store/hhzvw77vrmn5f506kfyb1yh1sdinkbwf-gmp-6.1.2/lib/libHSgraphmod-plugin-0.1.0.0-3YjHj1EtcCZGtpEicyDU7w_p-ghc8.6.1.20180803.so

None of which exist.

Trac metadata

Trac field	Value
Version	8.4.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	highest
Resolution	Unresolved
Component	Compiler
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