Build failure on GHC 7.6

```
Configuring fixed-0.2.1...
Dependency base ==4.6.0.1: using base-4.6.0.1
Using Cabal-1.20.0.2 compiled by ghc-7.6
Using compiler: ghc-7.6.3
Using install prefix: /home/ubuntu/.cabal
Binaries installed in: /home/ubuntu/haskell/stackage/sandbox/bin
Libraries installed in:
/home/ubuntu/haskell/stackage/sandbox/lib/x86_64-linux-ghc-7.6.3/fixed-0.2.1
Private binaries installed in: /home/ubuntu/.cabal/libexec
Data files installed in:
/home/ubuntu/haskell/stackage/sandbox/share/x86_64-linux-ghc-7.6.3/fixed-0.2.1
Documentation installed in:
/home/ubuntu/haskell/stackage/sandbox/share/doc/fixed-0.2.1
Configuration files installed in: /home/ubuntu/.cabal/etc
Using alex version 3.1.3 found on system at:
/home/ubuntu/haskell/stackage/sandbox/bin/alex
Using ar found on system at: /usr/bin/ar
Using c2hs version 0.19.1 found on system at:
/home/ubuntu/haskell/stackage/sandbox/bin/c2hs
Using cpphs version 1.18.6 found on system at:
/home/ubuntu/haskell/stackage/sandbox/bin/cpphs
No ffihugs found
Using gcc version 4.6 found on system at: /usr/bin/gcc
Using ghc version 7.6.3 found on system at: /opt/ghc/7.6.3/bin/ghc
Using ghc-pkg version 7.6.3 found on system at: /opt/ghc/7.6.3/bin/ghc-pkg
No greencard found
Using haddock version 2.13.2 found on system at: /opt/ghc/7.6.3/bin/haddock
Using happy version 1.19.4 found on system at:
/home/ubuntu/haskell/stackage/sandbox/bin/happy
Using haskell-suite found on system at: haskell-suite-dummy-location
Using haskell-suite-pkg found on system at: haskell-suite-pkg-dummy-location
No hmake found
Using hpc version 0.6 found on system at: /opt/ghc/7.6.3/bin/hpc
Using hsc2hs version 0.67 found on system at: /opt/ghc/7.6.3/bin/hsc2hs
Using hscolour version 1.20 found on system at:
/home/ubuntu/.cabal/bin/HsColour
No hugs found
No jhc found
Using ld found on system at: /usr/bin/ld
No lhc found
No lhc-pkg found
No nhc98 found
Using pkg-config version 0.26 found on system at: /usr/bin/pkg-config
Using strip found on system at: /usr/bin/strip
Using tar found on system at: /bin/tar
No uhc found
Component build order: library
creating dist/build
creating dist/build/autogen
Building fixed-0.2.1...
Preprocessing library fixed-0.2.1...
Building library...
creating dist/build
/opt/ghc/7.6.3/bin/ghc --make -fbuilding-cabal-package -O -outputdir dist/build -odir dist/build -hidir dist/build -stubdir dist/build -i -idist/build -isrc -idist/build/autogen -Idist/build/autogen -Idist/build -optP-include -optPdist/build/autogen/cabal_macros.h -package-name fixed-0.2.1 -hide-all-packages -no-user-package-db -package-db /home/ubuntu/haskell/stackage/sandbox/package-db -package-db dist/package.conf.inplace -package-id base-4.6.0.1-8aa5d403c45ea59dcd2c39f123e27d57 -XHaskell98 Numeric.Fixed -Wall -fwarn-tabs -O2

src/Numeric/Fixed.hs:9:8:
Could not find module `Data.Coerce'
Use -v to see a list of the files searched for.
```