ghc "panic! (the 'impossible' happened)" building vimus on NixOS

Hey there, I'm having trouble building vimus (https://github.com/vimus/vimus) on NixOS. The package builds fine locally for an x64 system, but is failing on i686 builds.
On the NixOS builder: http://hydra.nixos.org/build/17512103/nixlog/2
[nix-shell:/tmp/build-17512103/vimus-0.2.0]$ ./Setup clean && ./Setup configure --enable-shared --enable-library-vanilla --enable-executable-dynamic --enable-tests  --ghc-option=-optl=-Wl,-rpath=/nix/store/cgkfxxk1iz30fg0r3kf9dv2p550i5hn2-vimus-0.2.0/lib/ghc-7.8.3/vimus-0.2.0 --ghc-option=-j8 && ./Setup build
cleaning...
Configuring vimus-0.2.0...
Building vimus-0.2.0...
Preprocessing library vimus-0.2.0...
[ 1 of 39] Compiling Constant         ( dist/build/Constant.hs, dist/build/Constant.o )
[ 2 of 39] Compiling CursesUtil       ( ncursesw/src/CursesUtil.hs, dist/build/CursesUtil.o )
[ 3 of 39] Compiling Timer            ( src/Timer.hs, dist/build/Timer.o )
[ 4 of 39] Compiling UI.Curses.Type   ( dist/build/UI/Curses/Type.hs, dist/build/UI/Curses/Type.o )
[ 5 of 39] Compiling Misc             ( dist/build/Misc.hs, dist/build/Misc.o )

ncursesw/src/Misc.chs:7:1: Warning:
    The import of ‘Foreign.C.String’ is redundant
      except perhaps to import instances from ‘Foreign.C.String’
    To import instances alone, use: import Foreign.C.String()

ncursesw/src/Misc.chs:8:1: Warning:
    The import of ‘Foreign.Marshal.Alloc’ is redundant
      except perhaps to import instances from ‘Foreign.Marshal.Alloc’
    To import instances alone, use: import Foreign.Marshal.Alloc()

ncursesw/src/Misc.chs:9:1: Warning:
    The import of ‘Foreign.Storable’ is redundant
      except perhaps to import instances from ‘Foreign.Storable’
    To import instances alone, use: import Foreign.Storable()

ncursesw/src/Misc.chs:10:1: Warning:
    The import of ‘Foreign.ForeignPtr’ is redundant
      except perhaps to import instances from ‘Foreign.ForeignPtr’
    To import instances alone, use: import Foreign.ForeignPtr()

ncursesw/src/Misc.chs:12:1: Warning:
    The import of ‘Data.Char’ is redundant
      except perhaps to import instances from ‘Data.Char’
    To import instances alone, use: import Data.Char()

ncursesw/src/Misc.chs:29:1: Warning:
    Top-level binding with no type signature:
      cFromBool :: Bool -> Integer

ncursesw/src/Misc.chs:29:13: Warning:
    Defaulting the following constraint(s) to type ‘Integer’
      (Num a0) arising from a use of ‘fromBool’
    In the expression: fromBool
    In an equation for ‘cFromBool’: cFromBool = fromBool

ncursesw/src/Misc.chs:30:1: Warning:
    Top-level binding with no type signature:
      cToBool :: Integer -> Bool

ncursesw/src/Misc.chs:30:13: Warning:
    Defaulting the following constraint(s) to type ‘Integer’
      (Num a0)
        arising from a use of ‘toBool’ at ncursesw/src/Misc.chs:30:13-18
      (Eq a0)
        arising from a use of ‘toBool’ at ncursesw/src/Misc.chs:30:13-18
    In the expression: toBool
    In an equation for ‘cToBool’: cToBool = toBool

ncursesw/src/Misc.chs:42:1: Warning:
    Top-level binding with no type signature: fromAttr :: Attr -> CInt

ncursesw/src/Misc.chs:77:1: Warning:
    Top-level binding with no type signature:
      wcolor_set :: Window -> Int -> IO Status

ncursesw/src/Misc.chs:86:1: Warning:
    Top-level binding with no type signature:
      wattr_off :: Window -> [Attribute] -> IO Status

ncursesw/src/Misc.chs:90:1: Warning:
    Top-level binding with no type signature:
      wattr_on :: Window -> [Attribute] -> IO Status

ncursesw/src/Misc.chs:98:1: Warning:
    Top-level binding with no type signature:
      wchgat :: Window -> Int -> [Attribute] -> Int -> IO Status

ncursesw/src/Misc.chs:103:1: Warning:
    Top-level binding with no type signature:
      mvwchgat :: Window
                  -> Int -> Int -> Int -> [Attribute] -> Int -> IO Status
[ 6 of 39] Compiling CursesInput      ( dist/build/CursesInput.hs, dist/build/CursesInput.o )
[ 7 of 39] Compiling Instances        ( src/Instances.hs, dist/build/Instances.o )
[ 8 of 39] Compiling Data.List.Pointed ( src/Data/List/Pointed.hs, dist/build/Data/List/Pointed.o )
[ 9 of 39] Compiling Data.List.Zipper ( src/Data/List/Zipper.hs, dist/build/Data/List/Zipper.o )
[10 of 39] Compiling UI.Curses.Key    ( dist/build/UI/Curses/Key.hs, dist/build/UI/Curses/Key.o )
[11 of 39] Compiling Vimus.Tab        ( src/Vimus/Tab.hs, dist/build/Vimus/Tab.o )
[12 of 39] Compiling Vimus.Command.Parser ( src/Vimus/Command/Parser.hs, dist/build/Vimus/Command/Parser.o )
[13 of 39] Compiling Vimus.Key        ( src/Vimus/Key.hs, dist/build/Vimus/Key.o )
[14 of 39] Compiling Paths_vimus      ( dist/build/autogen/Paths_vimus.hs, dist/build/Paths_vimus.o )
[15 of 39] Compiling Vimus.Song       ( src/Vimus/Song.hs, dist/build/Vimus/Song.o )
[16 of 39] Compiling Vimus.Song.Format ( src/Vimus/Song/Format.hs, dist/build/Vimus/Song/Format.o )
[17 of 39] Compiling Vimus.Queue      ( src/Vimus/Queue.hs, dist/build/Vimus/Queue.o )
[18 of 39] Compiling Vimus.Util       ( src/Vimus/Util.hs, dist/build/Vimus/Util.o )
[19 of 39] Compiling Option           ( src/Option.hs, dist/build/Option.o )
[20 of 39] Compiling PlaybackState    ( src/PlaybackState.hs, dist/build/PlaybackState.o )
[21 of 39] Compiling Curses           ( dist/build/Curses.hs, dist/build/Curses.o )

ncursesw/src/Curses.chs:73:1: Warning:
    The import of ‘Foreign.C.String’ is redundant
      except perhaps to import instances from ‘Foreign.C.String’
    To import instances alone, use: import Foreign.C.String()

ncursesw/src/Curses.chs:76:1: Warning:
    The import of ‘chr’ from module ‘Data.Char’ is redundant

ncursesw/src/Curses.chs:150:1: Warning:
    Defined but not used: ‘wnoutrefresh’

ncursesw/src/Curses.chs:151:1: Warning:
    Defined but not used: ‘doupdate’

ncursesw/src/Curses.chs:152:1: Warning:
    Defined but not used: ‘redrawwin’

ncursesw/src/Curses.chs:153:1: Warning:
    Defined but not used: ‘wredrawln’

ncursesw/src/Curses.chs:160:1: Warning:
    Defined but not used: ‘getparyx’

ncursesw/src/Curses.chs:207:1: Warning:
    Defined but not used: ‘cFromBool’

ncursesw/src/Curses.chs:207:1: Warning:
    Top-level binding with no type signature:
      cFromBool :: Bool -> Integer

ncursesw/src/Curses.chs:207:13: Warning:
    Defaulting the following constraint(s) to type ‘Integer’
      (Num a0) arising from a use of ‘fromBool’
    In the expression: fromBool
    In an equation for ‘cFromBool’: cFromBool = fromBool

ncursesw/src/Curses.chs:374:1: Warning:
    Defined but not used: ‘wnoutrefresh'_’

ncursesw/src/Curses.chs:377:1: Warning:
    Defined but not used: ‘doupdate'_’

ncursesw/src/Curses.chs:380:1: Warning:
    Defined but not used: ‘redrawwin'_’

ncursesw/src/Curses.chs:383:1: Warning:
    Defined but not used: ‘wredrawln'_’

ncursesw/src/Curses.chs:389:1: Warning:
    Defined but not used: ‘getparyx'_’
[22 of 39] Compiling UI.Curses        ( ncursesw/src/UI/Curses.hs, dist/build/UI/Curses.o )
[23 of 39] Compiling Vimus.WindowLayout ( src/Vimus/WindowLayout.hs, dist/build/Vimus/WindowLayout.o )
[24 of 39] Compiling Vimus.Widget.Type ( src/Vimus/Widget/Type.hs, dist/build/Vimus/Widget/Type.o )
[25 of 39] Compiling Content          ( src/Content.hs, dist/build/Content.o )
[26 of 39] Compiling Vimus.Input      ( src/Vimus/Input.hs, dist/build/Vimus/Input.o )
[27 of 39] Compiling Vimus.Macro      ( src/Vimus/Macro.hs, dist/build/Vimus/Macro.o )
[28 of 39] Compiling Vimus.Render     ( src/Vimus/Render.hs, dist/build/Vimus/Render.o )
[29 of 39] Compiling Vimus.Ruler      ( src/Vimus/Ruler.hs, dist/build/Vimus/Ruler.o )
[30 of 39] Compiling Vimus.Type       ( src/Vimus/Type.hs, dist/build/Vimus/Type.o )
[31 of 39] Compiling Vimus.Command.Type ( src/Vimus/Command/Type.hs, dist/build/Vimus/Command/Type.o )
[32 of 39] Compiling Vimus.Command.Help ( src/Vimus/Command/Help.hs, dist/build/Vimus/Command/Help.o )
[33 of 39] Compiling Vimus.Command.Completion ( src/Vimus/Command/Completion.hs, dist/build/Vimus/Command/Completion.o )
[34 of 39] Compiling Vimus.Command.Core ( src/Vimus/Command/Core.hs, dist/build/Vimus/Command/Core.o )
[35 of 39] Compiling Vimus.Widget.ListWidget ( src/Vimus/Widget/ListWidget.hs, dist/build/Vimus/Widget/ListWidget.o )
[36 of 39] Compiling Vimus.Widget.TextWidget ( src/Vimus/Widget/TextWidget.hs, dist/build/Vimus/Widget/TextWidget.o )
[37 of 39] Compiling Vimus.Widget.HelpWidget ( src/Vimus/Widget/HelpWidget.hs, dist/build/Vimus/Widget/HelpWidget.o )
[38 of 39] Compiling Vimus.Command    ( src/Vimus/Command.hs, dist/build/Vimus/Command.o )
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package array-0.5.0.0 ... linking ... done.
Loading package deepseq-1.3.0.2 ... linking ... done.
Loading package bytestring-0.10.4.0 ... linking ... done.
Loading package containers-0.5.5.1 ... linking ... done.
Loading package text-1.2.0.0 ... linking ... done.
Loading package hashable-1.2.2.0 ... linking ... done.
Loading package scientific-0.3.3.2 ... linking ... done.
Loading package attoparsec-0.12.1.2 ... linking ... done.
Loading package setlocale-1.0.0.1 ... linking ... done.
Loading package utf8-string-0.3.8 ... linking ... done.
Loading package wcwidth-0.0.2 ... linking ... done.
Loading package pretty-1.1.1.1 ... linking ... done.
Loading package template-haskell ... linking ... done.
Loading package filepath-1.3.0.2 ... linking ... done.
Loading package old-locale-1.0.0.6 ... linking ... done.
Loading package time-1.4.2 ... linking ... done.
Loading package unix-2.7.0.1 ... linking ... done.
Loading package directory-1.2.1.0 ... linking ... done.
Loading package process-1.2.0.0 ... linking ... done.
Loading package data-default-class-0.0.1 ... linking ... done.
Loading package data-default-instances-base-0.0.1 ... linking ... done.
Loading package data-default-instances-containers-0.0.1 ... linking ... done.
Loading package dlist-0.7.1 ... linking ... done.
Loading package data-default-instances-dlist-0.0.1 ... linking ... done.
Loading package data-default-instances-old-locale-0.0.1 ... linking ... done.
Loading package data-default-0.5.3 ... linking ... done.
Loading package transformers-0.3.0.0 ... linking ... done.
Loading package mtl-2.1.3.1 ... linking ... done.
Loading package network-2.6.0.2 ... linking ... done.
Loading package libmpd-0.9.0.1 ... linking ... done.

<no location info>:
    ghc: panic! (the 'impossible' happened)
  (GHC version 7.8.3 for i386-unknown-linux):
	Loading temp shared object failed: /tmp/ghc6364_1/ghc6364_192.so: undefined symbol: nm_getyx

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

[nix-shell:/tmp/build-17512103/vimus-0.2.0]$ nixos-version
14.11pre52840.c347f1c (Caterpillar)

[nix-shell:/tmp/build-17512103/vimus-0.2.0]$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.8.3

[nix-shell:/tmp/build-17512103/vimus-0.2.0]$ uname -a
Linux ip-10-83-15-102.us-west-2.compute.internal 3.12.30 #1-NixOS SMP Thu Jan 1 00:00:01 UTC 1970 x86_64 GNU/Linux
Thanks for any help!
Trac metadata
Trac field	Value
Version	7.8.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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ghc "panic! (the 'impossible' happened)" building vimus on NixOS
