stack: fix build.

Our sed call broke the cabal.config which resulted in unfit
dependencies.

Fixes #4747.

srcpkgs/stack/template

@@ -1,9 +1,9 @@
 # Template file for 'stack'
 pkgname=stack
 version=1.1.2
-revision=1
-_stackage="lts-6.1"
-hostmakedepends="cabal-install"
+revision=2
+_stackage="lts-6.17"
+hostmakedepends="cabal-install pkg-config"
 makedepends="zlib-devel pcre-devel"
 depends="git iana-etc"
 short_desc="Cross-platform program for developing Haskell projects"
@@ -14,14 +14,14 @@ distfiles="https://github.com/commercialhaskell/stack/archive/v${version}.tar.gz
  https://www.stackage.org/${_stackage}/cabal.config>cabal.config-${_stackage}"
 skip_extraction="cabal.config-${_stackage}"
 checksum="8f43d69a00a8861b156705a634e55179524cefbd98e6c29182e7bdcb57d8b3be
- 71d1779fca85531a0729bc562bf89a1dbc82e7099548156388571b8bf6067a66"
+ 2fe4734c6033257966c0f8beba7420e003286498c97326d313ded0ae9f5cc9eb"
 nocross=yes
 nopie=yes  # network-2.6.2.1 build fails with a relocation
 
 do_build() {
 	cabal sandbox init
 	cp ${XBPS_SRCDISTDIR}/${pkgname}-${version}/cabal.config-${_stackage} cabal.config
-	sed -i 's/Cabal ==.*/Cabal ==1.24.0.0/' cabal.config  # XXX hack for cabal-install
+	sed -i 's/Cabal ==.*/Cabal ==1.24.0.0,/' cabal.config  # XXX hack for cabal-install
 	cabal update
 	cabal install ${makejobs} --only-dependencies
 	cabal install ${makejobs} cpphs