diff --git a/haskell/haskell-rio/Setup.hs b/haskell/haskell-rio/Setup.hs
deleted file mode 100644
index 9a994af677..0000000000
--- a/haskell/haskell-rio/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/haskell/haskell-rio/haskell-rio.SlackBuild b/haskell/haskell-rio/haskell-rio.SlackBuild
index d12d6a3c94..911405b7d6 100644
--- a/haskell/haskell-rio/haskell-rio.SlackBuild
+++ b/haskell/haskell-rio/haskell-rio.SlackBuild
@@ -25,7 +25,7 @@
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=haskell-rio
-VERSION=${VERSION:-0.1.5.0}
+VERSION=${VERSION:-0.1.21.0}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
@@ -76,15 +76,20 @@ cd $TMP
 rm -rf $SRCNAM-$VERSION
 tar xvf $CWD/$SRCNAM-$VERSION.tar.gz
 cd $SRCNAM-$VERSION
+cat << EOF > Setup.hs
+module Main (main) where
+
+import Distribution.Simple
+
+main :: IO ()
+main = defaultMain
+EOF
 chown -R root:root .
 find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
   -o -perm 511 \) -exec chmod 755 {} \; -o \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
-
-cp $CWD/Setup.hs .
-
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 runghc Setup configure \
diff --git a/haskell/haskell-rio/haskell-rio.info b/haskell/haskell-rio/haskell-rio.info
index 1768fabd92..0f6fcecf15 100644
--- a/haskell/haskell-rio/haskell-rio.info
+++ b/haskell/haskell-rio/haskell-rio.info
@@ -1,10 +1,10 @@
 PRGNAM="haskell-rio"
-VERSION="0.1.5.0"
+VERSION="0.1.21.0"
 HOMEPAGE="https://hackage.haskell.org/package/rio"
-DOWNLOAD="https://hackage.haskell.org/packages/archive/rio/0.1.5.0/rio-0.1.5.0.tar.gz"
-MD5SUM="ad075d3472fde6bf28bd89c40ae02ea8"
+DOWNLOAD="https://hackage.haskell.org/packages/archive/rio/0.1.21.0/rio-0.1.21.0.tar.gz"
+MD5SUM="554a37103aee56956ab9c2a48ea15841"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
-REQUIRES="haskell-exceptions haskell-hashable haskell-microlens haskell-primitive haskell-typed-process haskell-unliftio haskell-unordered-containers haskell-vector"
+REQUIRES="haskell-exceptions haskell-hashable haskell-microlens haskell-primitive haskell-typed-process haskell-unliftio haskell-unordered-containers haskell-vector haskell-microlens-mtl"
 MAINTAINER="David Spencer"
 EMAIL="baildon.research@googlemail.com"