gnu: Add ghc-regex-pcre.

* gnu/packages/haskell-xyz.scm (ghc-regex-pcre): New public variable.

gnu/packages/haskell-xyz.scm

@@ -10249,6 +10249,29 @@ This is not good for Unicode users.  This modified regex-compat uses regex-tdfa
 this problem.")
     (license license:bsd-3)))
 
+(define-public ghc-regex-pcre
+  (package
+    (name "ghc-regex-pcre")
+    (version "0.94.4")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://hackage.haskell.org/package/"
+                                  "regex-pcre/regex-pcre-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1h16w994g9s62iwkdqa7bar2n9cfixmkzz2rm8svm960qr57valf"))))
+    (build-system haskell-build-system)
+    (inputs
+     `(("ghc-regex-base" ,ghc-regex-base)
+       ("pcre" ,pcre)))
+    (home-page "https://hackage.haskell.org/package/regex-pcre")
+    (synopsis "Enhancement of the builtin Text.Regex library")
+    (description
+     "This package is an enhancement of the @code{Text.Regex} library.
+It wraps the @code{PCRE} C library providing Perl-compatible regular
+expressions.")
+    (license license:bsd-3)))
+
 (define-public ghc-regex-pcre-builtin
   (package
     (name "ghc-regex-pcre-builtin")