diff --git a/shake-ext.cabal b/shake-ext.cabal
--- a/shake-ext.cabal
+++ b/shake-ext.cabal
@@ -1,5 +1,5 @@
 name:                shake-ext
-version:             2.3.0.0
+version:             2.3.0.1
 synopsis:            Helper functions for linting with shake 
 description:         This package provides several linters out of the box, for use with [shake](http://shakebuild.com/).
 homepage:            https://hub.darcs.net/vmchale/shake-ext
@@ -8,7 +8,7 @@
 author:              Vanessa McHale
 maintainer:          vamchale@gmail.com
 copyright:           Copyright: (c) 2018 Vanessa McHale
-category:            Development
+category:            Development, Shake
 build-type:          Simple
 extra-doc-files:     README.md
 cabal-version:       1.18
diff --git a/src/Development/Shake/TH.hs b/src/Development/Shake/TH.hs
--- a/src/Development/Shake/TH.hs
+++ b/src/Development/Shake/TH.hs
@@ -21,7 +21,7 @@
 
 commonVersion :: String -> Action String
 commonVersion prog = do
-    (Stdout out) <- command mempty prog ["--version"]
+    ~(Stdout out) <- command mempty prog ["--version"]
     pure . last . words . head . lines $ out
 
 mkSigVersion :: String -> Dec