61/177: gnu: Add ghc-pretty-show-for-haskell-src-exts.

[Ricardo Wurmus]

rekado pushed a commit to branch master
in repository guix.

commit e0ba59a9f88e1b38cd7c0bd2fa6fd7b9076842cb
Author: Ricardo Wurmus <address@hidden>
Date:   Mon Feb 12 22:17:24 2018 +0100

    gnu: Add ghc-pretty-show-for-haskell-src-exts.
    
    * gnu/packages/haskell.scm (ghc-pretty-show-for-haskell-src-exts): New
    variable.
---
 gnu/packages/haskell.scm | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 1b39a1e..06f989b 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -977,6 +977,19 @@ complex generic values into an interactive Html page, for 
easier
 examination.")
     (license license:expat)))
 
+(define-public ghc-pretty-show-for-haskell-src-exts
+  (package (inherit ghc-pretty-show)
+    (name "ghc-pretty-show")
+    (version "1.6.10")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://hackage.haskell.org/package/pretty-show/";
+                           "pretty-show-" version ".tar.gz"))
+       (sha256
+        (base32
+         "133s4l1gk46saf6ycm785rswycy8g3j0qqrv93b5wp8cp50kd0ww"))))))
+
 (define-public ghc-haskell-src-exts
   (package
     (name "ghc-haskell-src-exts")