GHC fails with "Loading temp shared object failed"

While developing Yesod project on GHC 7.8.3, cabal install --force-reinstalls failed with the following error:

[9 of 9] Compiling Application      ( Application.hs, dist/dist-sandbox-e4ea4713/build/Application.o )
ghc: panic! (the 'impossible' happened)
  (GHC version 7.8.3 for x86_64-apple-darwin):
	Loading temp shared object failed: dlopen(/var/folders/qk/6s42bj3n6g30fyqf6mc2x_c80000gn/T/ghc13386_0/ghc13386_53.dylib, 9): Symbol not found: _aesonzm0zi8zi0zi1_DataziAesonziTypesziInternal_zdsfromList1_closure
  Referenced from: /var/folders/qk/6s42bj3n6g30fyqf6mc2x_c80000gn/T/ghc13386_0/ghc13386_53.dylib
  Expected in: flat namespace
 in /var/folders/qk/6s42bj3n6g30fyqf6mc2x_c80000gn/T/ghc13386_0/ghc13386_53.dylib

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

cabal: Error: some packages failed to install:
MyBlog-0.0.0 failed during the building phase. The exception was:
ExitFailure 1

(Full output at https://gist.github.com/MaxGabriel/847561107e4ee2e869f1. Verbose output at https://gist.github.com/MaxGabriel/10c2c3c253815b3f392a)

Following compilation, both aeson-0.8.0.1 and aeson-0.8.0.2 are present in the sandbox. Running cabal install again yields the same error (full output at https://gist.github.com/MaxGabriel/9aa530105d68a613de11).

The code for the project as it was when the panic happened is available here: https://github.com/MaxGabriel/MyBlog-GHC-Panic

Is there more information I could provide to diagnose the bug?

I'll probably wipe the sandbox and try recompiling in a bit.

Version info: OS : OS X 10.10 (14A389) (Yosemite) Cabal: cabal-install version 1.20.0.3 using version 1.20.0.1 of the Cabal library GHC: The Glorious Glasgow Haskell Compilation System, version 7.8.3

Edit: Probably relevant that the original package set was compiled under OS X 10.9 (Mavericks). The reinstall that triggered the panic was under Yosemite.