diff --git a/hcat.cabal b/hcat.cabal
index f84a895..0923336 100644
--- a/hcat.cabal
+++ b/hcat.cabal
@@ -27,10 +27,9 @@ library
       BlockArguments
       OverloadedStrings
       ImportQualifiedPost
-  ghc-options: -Wall -fdefer-typed-holes
+  ghc-options: -Wall -Wunused-packages -fdefer-typed-holes
   build-depends:
       base >=4.13 && <5
-    , process
     , text
   default-language: GHC2021
 
@@ -44,7 +43,7 @@ executable hcat
       BlockArguments
       OverloadedStrings
       ImportQualifiedPost
-  ghc-options: -Wall -fdefer-typed-holes
+  ghc-options: -Wall -Wunused-packages -fdefer-typed-holes
   build-depends:
       base >=4.13 && <5
     , hcat
@@ -62,7 +61,7 @@ test-suite spec
       BlockArguments
       OverloadedStrings
       ImportQualifiedPost
-  ghc-options: -Wall -fdefer-typed-holes
+  ghc-options: -Wall -Wunused-packages -fdefer-typed-holes
   cpp-options: -DTEST
   build-tool-depends:
       hspec-discover:hspec-discover
diff --git a/package.yaml b/package.yaml
index b2d6beb..40a373f 100644
--- a/package.yaml
+++ b/package.yaml
@@ -13,10 +13,12 @@ dependencies:
   - base >= 4.13 && < 5
 #  - bytestring
 #  - time
+#  - process
 #  - directory
 
 ghc-options:
   - -Wall
+  - -Wunused-packages
   - -fdefer-typed-holes
 
 default-extensions:
@@ -28,7 +30,6 @@ library:
   source-dirs: src
   dependencies:
     - text
-    - process
   verbatim:
     default-language: GHC2021
 
diff --git a/src/HCat/Internal.hs b/src/HCat/Internal.hs
index 467a446..d28a0ff 100644
--- a/src/HCat/Internal.hs
+++ b/src/HCat/Internal.hs
@@ -4,8 +4,6 @@ module HCat.Internal where
 import Data.Text (Text)
 import Data.Text qualified as T
 
-import System.Process qualified as P
-
 -- | @parseArgs@ takes a list of strings and returns a single FilePath if there was exactly one element.
 --
 -- >>> parseArgs ["foo"]
@@ -69,8 +67,3 @@ paginate (ScreenDimensions rows cols) =
 
 type Pages = [Page]
 type Page = Text
-
-getScreenDimensions :: IO ScreenDimensions
-getScreenDimensions = ScreenDimensions <$> tput "lines" <*> tput "cols"
- where
-  tput cmd = read <$> P.readProcess "tput" [cmd] ""