diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 1.0.0.0
+
+  * Conform to `archive-sig` 1.0.0.0
+
 # 0.2.2.1
 
   * Improved `versionInfo`
diff --git a/archive-tar.cabal b/archive-tar.cabal
--- a/archive-tar.cabal
+++ b/archive-tar.cabal
@@ -1,6 +1,6 @@
 cabal-version:   2.0
 name:            archive-tar
-version:         0.2.2.1
+version:         1.0.0.0
 license:         BSD3
 license-file:    LICENSE
 copyright:       Copyright: (c) 2019-2020 Vanessa McHale
@@ -34,7 +34,7 @@
     ghc-options:        -Wall
     build-depends:
         base >=4.3 && <5,
-        tar -any,
+        tar >=0.6.0.0,
         bytestring -any,
         composition-prelude >=2.0.3.0
 
@@ -48,3 +48,6 @@
 
     if impl(ghc >=8.4)
         ghc-options: -Wmissing-export-lists
+
+    if impl(ghc >=8.10)
+        ghc-options: -Wunused-packages
diff --git a/src/Archive/Tar.cpphs b/src/Archive/Tar.cpphs
--- a/src/Archive/Tar.cpphs
+++ b/src/Archive/Tar.cpphs
@@ -1,13 +1,15 @@
 module Archive.Tar ( Entry
                    , Error
+                   , FP
                    , writeArchiveBytes
-                   , unpackToDir
+                   , unpackToDirRaw
                    , readArchiveBytes
-                   , packFiles
+                   , packFilesRaw
                    , versionInfo
+                   , toFP
                    ) where
 
-import           Codec.Archive.Tar    (Entries (..))
+import           Codec.Archive.Tar    (Entries, GenEntries (..))
 import qualified Codec.Archive.Tar    as Tar
 import           Control.Composition  ((.@))
 import qualified Data.ByteString.Lazy as BSL
@@ -18,6 +20,11 @@
 
 type Error = Tar.FormatError
 
+type FP = FilePath
+
+toFP :: FilePath -> FP
+toFP = id
+
 -- this is bad but libarchive's error handling is vaguely fucked
 coerceToList :: Entries a -> Either a [Entry]
 coerceToList (Next e es) = (e :) <$> coerceToList es
@@ -30,11 +37,11 @@
 readArchiveBytes :: BSL.ByteString -> Either Error [Entry]
 readArchiveBytes = coerceToList . Tar.read
 
-unpackToDir :: FilePath -> BSL.ByteString -> IO ()
-unpackToDir = Tar.read .@ Tar.unpack
+unpackToDirRaw :: FP -> BSL.ByteString -> IO ()
+unpackToDirRaw = Tar.read .@ Tar.unpack
 
-packFiles :: [FilePath] -> IO BSL.ByteString
-packFiles = fmap Tar.write . Tar.pack "."
+packFilesRaw :: [FP] -> IO BSL.ByteString
+packFilesRaw = fmap Tar.write . Tar.pack "."
 
 -- | @since 0.2.2.0
 versionInfo :: String