sform.cabal

-- Initial sform.cabal generated by cabal init.  For further documentation,
--  see http://haskell.org/cabal/users-guide/

name:                sform
version:             0.1.0.0
-- synopsis:            
-- description:         
-- license:             
license-file:        LICENSE
author:              Mark Wotton
maintainer:          mwotton@gmail.com
-- copyright:           
-- category:            
build-type:          Simple
-- extra-source-files:  
cabal-version:       >=1.10

executable sform
  main-is:             Main.hs
  -- other-modules:       
  -- other-extensions:    
  build-depends:       base >=4.7 && <4.8
                      ,simple-form
                      ,wai-digestive-functors
  -- hs-source-dirs:      
  default-language:    Haskell2010

trace

rhino ➜  ~/projects/sform  cabal install --only-dependencies --enable-tests --enable-benchmarks  -j --force-reinstalls
Resolving dependencies...
cabal: Could not resolve dependencies:
trying: sform-0.1.0.0 (user goal)
trying: wai-digestive-functors-0.2 (dependency of sform-0.1.0.0)
trying: digestive-functors-0.7.1.1 (dependency of wai-digestive-functors-0.2)
trying: mtl-2.2.0.1 (dependency of digestive-functors-0.7.1.1)
next goal: transformers (dependency of mtl-2.2.0.1)
rejecting: transformers-0.3.0.0/installed-aab... (conflict: mtl =>
transformers==0.4.*)
trying: transformers-0.4.1.0
trying: bytestring-0.10.4.0/installed-a7e... (dependency of
digestive-functors-0.7.1.1)
trying: wai-util-0.7 (dependency of wai-digestive-functors-0.2)
trying: network-2.5.0.0 (dependency of wai-util-0.7)
next goal: wai-extra (dependency of wai-digestive-functors-0.2)
rejecting: wai-extra-2.1.1.1, 2.1.1, 2.1.0.1, 2.1.0, 2.0.3.3, 2.0.3.2,
2.0.3.1, 2.0.3, 2.0.2, 2.0.1.2, 2.0.1.1, 2.0.1, 2.0.0.1, 2.0.0, 1.3.4.6,
1.3.4.5, 1.3.4.4, 1.3.4.3, 1.3.4.2, 1.3.4.1, 1.3.4, 1.3.3.2, 1.3.3.1, 1.3.3,
1.3.2.4, 1.3.2.3, 1.3.2.2, 1.3.2.1, 1.3.2, 1.3.1.1, 1.3.1, 1.3.0.5, 1.3.0.4,
1.3.0.3, 1.3.0.2 (conflict: transformers==0.4.1.0, wai-extra =>
transformers>=0.2.2 && <0.4)
rejecting: wai-extra-1.3.0.1, 1.3.0, 1.2.0.6, 1.2.0.5, 1.2.0.4 (conflict:
network==2.5.0.0, wai-extra => network>=2.2.1.5 && <2.4)
rejecting: wai-extra-1.2.0.3, 1.2.0.2, 1.2.0.1, 1.2.0, 1.1.0.1, 1.1.0,
1.0.0.1, 1.0.0, 0.4.6, 0.4.5.2, 0.4.5.1, 0.4.5 (conflict:
bytestring==0.10.4.0/installed-a7e..., wai-extra => bytestring>=0.9.1.4 &&
<0.10)
rejecting: wai-extra-0.4.4, 0.4.3, 0.4.2, 0.4.1.2, 0.4.1.1, 0.4.0.3, 0.4.0.2,
0.4.0.1, 0.4.0, 0.3.3, 0.3.2.1, 0.3.2, 0.3.1, 0.3.0, 0.2.4.2, 0.2.4.1, 0.2.4,
0.2.3, 0.2.2.2, 0.2.2.1, 0.2.2, 0.2.1, 0.2.0, 0.1.3.1, 0.1.3, 0.1.2.1, 0.1.2,
0.1.1, 0.1.0, 0.0.0.2, 0.0.0.1, 0.0.0 (conflict:
bytestring==0.10.4.0/installed-a7e..., wai-extra => bytestring>=0.9 && <0.10)
Backjump limit reached (change with --max-backjumps).

Note: when using a sandbox, all packages are required to have consistent
dependencies. Try reinstalling/unregistering the offending packages or
recreating the sandbox.

What happens if you try to install the packages one by one? It's not obvious to me why cabal is refusing to pick packages that will work in this case for you...