Upgrade to NSIS 3.0b2 and LTS 3.0

Installer.hs

@@ -54,11 +54,7 @@ installer projRoot arch version = nsis $ do
         file [Recursive] "bin/7z.*"
         file [Recursive] "bin/minghc-post-install.exe.7z"
         file [Recursive] "bin/all-*"
-        let shortArch =
-                case arch of
-                    Arch32 -> "32"
-                    Arch64 -> "64"
-        file [Recursive] $ fromString $ concat ["bin/", shortArch, "-*"]
+        file [Recursive] $ fromString $ concat ["bin/", showArchAbbr arch, "-*"]
 
         execWait "\"$INSTDIR/bin/7z.exe\" x -y \"-o$INSTDIR/bin\" \"$INSTDIR/bin/minghc-post-install.exe.7z\""
         NSIS.delete [] "$INSTDIR/bin/minghc-post-install.exe.7z"

README.md

@@ -44,9 +44,9 @@ Users of MinGHC installers do not need to build it themselves. Below are instruc
 
 You need NSIS installed:
 
-* Download [NSIS 3.0b1](http://nsis.sourceforge.net/), install it, and place the installation directory on your `PATH`.
-* Patch NSIS with the [large strings build for 3.0b1](http://prdownloads.sourceforge.net/nsis/nsis-3.0b1-strlen_8192.zip?download)
-  found among its [special builds](http://nsis.sourceforge.net/Special_Builds). (The patch is applied by copying
+* Download [NSIS 3.0b2](http://nsis.sourceforge.net/), install it, and place the installation directory on your `PATH`.
+* Patch NSIS with the **large strings build for 3.0b2** found among its
+  [special builds](http://nsis.sourceforge.net/Special_Builds). (The patch is applied by copying
   the files in the patch archive over top the NSIS installation.)
 
 ### Building Installers

stack.yaml

@@ -1,6 +1,3 @@
-extra-deps:
-- nsis-0.3
-resolver: lts-2.20
-flags: {}
+resolver: lts-3.0
 packages:
 - '.'