Resolving dependencies...
Downloading ed25519-0.0.1.0...
[1 of 1] Compiling Main             ( /tmp/ed25519-0.0.1.0-31831/ed25519-0.0.1.0/Setup.lhs, /tmp/ed25519-0.0.1.0-31831/ed25519-0.0.1.0/dist/setup/Main.o )
Linking /tmp/ed25519-0.0.1.0-31831/ed25519-0.0.1.0/dist/setup/setup ...
Configuring ed25519-0.0.1.0...
Building ed25519-0.0.1.0...
Preprocessing library ed25519-0.0.1.0...
[1 of 1] Compiling Crypto.Sign.Ed25519 ( src/Crypto/Sign/Ed25519.hs, dist/build/Crypto/Sign/Ed25519.o )

src/cbits/ed25519.c:1:0:
     error: CPU you selected does not support x86-64 instruction set
Failed to install ed25519-0.0.1.0
cabal: Error: some packages failed to install:
ed25519-0.0.1.0 failed during the building phase. The exception was:
ExitFailure 1