From 32b0a69cf86b313f6dbdf384892874f2758adb04 Mon Sep 17 00:00:00 2001
From: Jacob MacDonald <address@hidden>
Date: Fri, 7 Jun 2019 05:36:25 -0500
Subject: [PATCH 5/7] gnu: Add ghc-concurrent-output.

* gnu/packages/haskell.scm (ghc-concurrent-output): New variable.
---
 gnu/packages/haskell.scm | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index ddbb2ae6ef..5c4756a077 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -11649,6 +11649,40 @@ default)
 @end itemize")
     (license license:bsd-3)))
 
+(define-public ghc-concurrent-output
+  (package
+    (name "ghc-concurrent-output")
+    (version "1.10.10")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "mirror://hackage/package/concurrent-output/concurrent-output-"
+             version
+             ".tar.gz"))
+       (sha256
+        (base32
+         "1wnjxnwbc3l853kiiijagzjyb6fmhz3lmkwls24plbximl1qrr22"))))
+    (build-system haskell-build-system)
+    (inputs
+     `(("ghc-async" ,ghc-async)
+       ("ghc-stm" ,ghc-stm)
+       ("ghc-exceptions" ,ghc-exceptions)
+       ("ghc-ansi-terminal" ,ghc-ansi-terminal)
+       ("ghc-terminal-size" ,ghc-terminal-size)))
+    (home-page
+     "https://hackage.haskell.org/package/concurrent-output")
+    (synopsis
+     "Ungarble output from several threads or commands")
+    (description
+     "Lets multiple threads and external processes concurrently output to the
+console, without it getting all garbled up.
+
+Built on top of that is a way of defining multiple output regions, which are
+automatically laid out on the screen and can be individually updated by
+concurrent threads.  Can be used for progress displays etc.")
+    (license license:bsd-2)))
+
 (define-public ghc-wl-pprint-annotated
   (package
     (name "ghc-wl-pprint-annotated")
-- 
2.21.0