diff --git a/shakers.cabal b/shakers.cabal
--- a/shakers.cabal
+++ b/shakers.cabal
@@ -1,5 +1,5 @@
 name:                  shakers
-version:               0.0.44
+version:               0.0.45
 synopsis:              Shake helpers.
 description:           Primitive helpers for Shake files.
 homepage:              https://github.com/swift-nav/shakers
@@ -19,10 +19,8 @@
   ghc-options:         -Wall
   build-depends:       base >= 4.8 && < 5
                      , basic-prelude
-                     , deepseq
                      , directory
                      , lifted-base
-                     , regex-compat
                      , shake
 
 source-repository head
diff --git a/src/Development/Shakers.hs b/src/Development/Shakers.hs
--- a/src/Development/Shakers.hs
+++ b/src/Development/Shakers.hs
@@ -60,12 +60,10 @@
 #if MIN_VERSION_basic_prelude(0,7,0)
 import Control.Exception.Lifted
 #endif
-import Control.DeepSeq
 import Data.Char
 import Development.Shake          as Exports
 import Development.Shake.FilePath
 import System.Directory
-import Text.Regex
 
 -- | Join strings with ":"
 --
@@ -241,11 +239,6 @@
 --
 m4 :: [String] -> Action String
 m4 = cmdArgs "m4"
-
--- | tar command.
---
-tar_ :: FilePath -> [String] -> Action ()
-tar_ d = cmdArgsDir_ d "tar"
 
 -- | AWS command.
 --