Tests fail via nix

@tmcdonell - this is just to record my progress for now.

```
Preprocessing test suite 'doctest' for accelerate-1.3.0.0..
Building test suite 'doctest' for accelerate-1.3.0.0..
[1 of 2] Compiling Build_doctests ( dist/build/doctest/autogen/Build_doctests.hs, dist/build/doctest/doctest-tmp/Build_doctests.o )
[2 of 2] Compiling Main ( test/doctest/Main.hs, dist/build/doctest/doctest-tmp/Main.o )
Linking dist/build/doctest/doctest ...
Preprocessing test suite 'nofib-interpreter' for accelerate-1.3.0.0..
Building test suite 'nofib-interpreter' for accelerate-1.3.0.0..
[1 of 1] Compiling Main ( test/nofib/Main.hs, dist/build/nofib-interpreter/nofib-interpreter-tmp/Main.o )
Linking dist/build/nofib-interpreter/nofib-interpreter ...
running tests
Running 2 test suites...
Test suite doctest: RUNNING...
Test suite doctest: PASS
Test suite logged to: dist/test/accelerate-1.3.0.0-doctest.log
Test suite nofib-interpreter: RUNNING...
nofib-interpreter: Data.Array.Accelerate: the nofib test-suite has been disabled.
Reinstall package 'accelerate' with '-fnofib' to enable it.

CallStack (from HasCallStack):
error, called at src/Data/Array/Accelerate/Test/NoFib.hs:45:14 in accelerate-1.3.0.0-J5N7VhAalHFCQfUrU9zJOH:Data.Array.Accelerate.Test.NoFib
Test suite nofib-interpreter: FAIL
Test suite logged to: dist/test/accelerate-1.3.0.0-nofib-interpreter.log
1 of 2 test suites (1 of 2 test cases) passed.
builder for '/nix/store/a6c50g866xq3ilb4m1wbs492fv6b3hrx-accelerate-1.3.0.0.drv' failed with exit code 1
error: build of '/nix/store/a6c50g866xq3ilb4m1wbs492fv6b3hrx-accelerate-1.3.0.0.drv' failed
```