flake: Add dependency to process

hcat.cabal

@@ -27,9 +27,10 @@ library
       BlockArguments
       OverloadedStrings
       ImportQualifiedPost
-  ghc-options: -Wall -Wunused-packages -fdefer-typed-holes
+  ghc-options: -Wall -fdefer-typed-holes
   build-depends:
       base >=4.13 && <5
+    , process
     , text
   default-language: GHC2021
 
@@ -43,7 +44,7 @@ executable hcat
       BlockArguments
       OverloadedStrings
       ImportQualifiedPost
-  ghc-options: -Wall -Wunused-packages -fdefer-typed-holes
+  ghc-options: -Wall -fdefer-typed-holes
   build-depends:
       base >=4.13 && <5
     , hcat
@@ -61,7 +62,7 @@ test-suite spec
       BlockArguments
       OverloadedStrings
       ImportQualifiedPost
-  ghc-options: -Wall -Wunused-packages -fdefer-typed-holes
+  ghc-options: -Wall -fdefer-typed-holes
   cpp-options: -DTEST
   build-tool-depends:
       hspec-discover:hspec-discover

package.yaml

@@ -13,12 +13,10 @@ dependencies:
   - base >= 4.13 && < 5
 #  - bytestring
 #  - time
-#  - process
 #  - directory
 
 ghc-options:
   - -Wall
-  - -Wunused-packages
   - -fdefer-typed-holes
 
 default-extensions:
@@ -30,6 +28,7 @@ library:
   source-dirs: src
   dependencies:
     - text
+    - process
   verbatim:
     default-language: GHC2021