distributed-process

Cloud Haskell: Erlang-style concurrency in Haskell

https://haskell-distributed.github.io/

LTS Haskell 24.28:	0.7.8@rev:1
Stackage Nightly 2026-01-18:	0.7.8@rev:1
Latest on Hackage:	0.7.8@rev:1

See all snapshots distributed-process appears in

BSD-3-Clause licensed by Duncan Coutts, Nicolas Wu, Edsko de Vries

Maintained by The Distributed Haskell team

This version can be pinned in stack with:distributed-process-0.7.8@sha256:daf464bba8b443d6d3b747fd9ab7a72be66d39158bf7ece2aeb602ca58260114,7873

Module documentation for 0.7.8

Control
- Control.Distributed
  - Control.Distributed.Process
    - Control.Distributed.Process.Closure
    - Control.Distributed.Process.Debug
    - Control.Distributed.Process.Internal
      - Control.Distributed.Process.Internal.BiMultiMap
      - Control.Distributed.Process.Internal.CQueue
      - Control.Distributed.Process.Internal.Closure
        Control.Distributed.Process.Internal.Closure.BuiltIn
        
        Control.Distributed.Process.Internal.Closure.Explicit
      - Control.Distributed.Process.Internal.Messaging
      - Control.Distributed.Process.Internal.Primitives
      - Control.Distributed.Process.Internal.Spawn
      - Control.Distributed.Process.Internal.StrictContainerAccessors
      - Control.Distributed.Process.Internal.StrictList
      - Control.Distributed.Process.Internal.StrictMVar
      - Control.Distributed.Process.Internal.Types
      - Control.Distributed.Process.Internal.WeakTQueue
    - Control.Distributed.Process.Management
      - Control.Distributed.Process.Management.Internal
        Control.Distributed.Process.Management.Internal.Agent
        
        Control.Distributed.Process.Management.Internal.Bus
        
        Control.Distributed.Process.Management.Internal.Trace
        Control.Distributed.Process.Management.Internal.Trace.Primitives
        
        Control.Distributed.Process.Management.Internal.Trace.Remote
        
        Control.Distributed.Process.Management.Internal.Trace.Tracer
        
        Control.Distributed.Process.Management.Internal.Trace.Types
        
        Control.Distributed.Process.Management.Internal.Types
    - Control.Distributed.Process.Node
    - Control.Distributed.Process.Serializable
    - Control.Distributed.Process.UnsafePrimitives

Depends on 17 packages(full list with versions):

data-accessor, distributed-static, hashable, network-transport, random, rank1dynamic, syb

Used by 9 packages in nightly-2026-01-18(full list with versions):

distributed-process-async, distributed-process-client-server, distributed-process-execution, distributed-process-extras, distributed-process-monad-control, distributed-process-simplelocalnet, distributed-process-supervisor, distributed-process-systest, distributed-process-tests

This is an implementation of Cloud Haskell, as described in Towards Haskell in the Cloud by Jeff Epstein, Andrew Black, and Simon Peyton Jones (https://simon.peytonjones.org/haskell-cloud/), although some of the details are different. The precise message passing semantics are based on A unified semantics for future Erlang by Hans Svensson, Lars-Åke Fredlund and Clara Benac Earle.

You will probably also want to install a Cloud Haskell backend such as distributed-process-simplelocalnet.