diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@
 
 This project adheres to the [Haskell Package Versioning Policy](https://pvp.haskell.org/).
 
+## [0.5.0.0] - 2023-07-13
+
+- Move Linux.Systemd to systemd-api library to make docs build on hackage.
+
 ## [0.4.0.1] - 2023-06-27
 
 - Build with GHC 9.4
diff --git a/posix-api.cabal b/posix-api.cabal
--- a/posix-api.cabal
+++ b/posix-api.cabal
@@ -1,6 +1,6 @@
 cabal-version: 2.2
 name: posix-api
-version: 0.4.0.1
+version: 0.5.0.0
 synopsis: posix bindings
 description:
   This library provides a very thin wrapper around POSIX APIs. It can be
@@ -82,7 +82,6 @@
     Linux.Epoll
     Linux.MessageQueue
     Linux.Socket
-    Linux.Systemd
     Posix.Directory
     Posix.File
     Posix.MessageQueue
@@ -106,10 +105,10 @@
     , base >=4.17.1 && <5
     , byte-order >= 0.1.2 && <0.2
     , byteslice >= 0.2.10 && <0.3
-    , primitive >= 0.7 && <0.8
+    , primitive >= 0.7 && <0.10
     , primitive-addr >= 0.1 && <0.2
     , primitive-offset >= 0.2 && <0.3
-    , primitive-unlifted >= 2.0 && <2.1
+    , primitive-unlifted >= 2.0 && <2.2
     , run-st >= 0.1.1 && <0.2
     , text-short >=0.1.5
   hs-source-dirs: src
@@ -124,7 +123,6 @@
   c-sources: cbits/HaskellPosix.c
   include-dirs: include
   includes: HaskellPosix.h
-  extra-libraries: systemd
   build-tool-depends: hsc2hs:hsc2hs >= 0.68.5
 
 test-suite test
diff --git a/src/Linux/Systemd.hs b/src/Linux/Systemd.hs
deleted file mode 100644
--- a/src/Linux/Systemd.hs
+++ /dev/null
@@ -1,36 +0,0 @@
-module Linux.Systemd
-  ( listenFds
-  , isSocket
-  ) where
-
-import Foreign.C.Types (CInt(..))
-import System.Posix.Types (Fd(..))
-import Foreign.C.Error (Errno,getErrno)
-import Posix.Socket.Types (Type(..),Family(..))
-
-foreign import ccall unsafe "systemd/sd-daemon.h sd_listen_fds"
-  c_listenFds :: CInt -> IO CInt
-
-foreign import ccall unsafe "systemd/sd-daemon.h sd_is_socket"
-  c_isSocket :: Fd -> Family -> Type -> CInt -> IO CInt
-
--- | Check for file descriptors passed by the system manager. Returns
--- the number of received file descriptors. If no file descriptors
--- have been received, zero is returned.
-listenFds ::
-     CInt -- ^ unset environment (non-zero unsets @LISTEN_FDS@, @LISTEN_PID@, and @LISTEN_FDNAMES@)
-  -> IO (Either Errno CInt)
-listenFds a = c_listenFds a >>= errorsFromInt
-
-isSocket :: 
-     Fd -- ^ File descriptor
-  -> Family -- ^ Socket family
-  -> Type -- ^ Socket type
-  -> CInt -- ^ Positive: require listen mode. Zero: require non-listening mode.
-  -> IO (Either Errno CInt)
-isSocket a b c d = c_isSocket a b c d >>= errorsFromInt
-
-errorsFromInt :: CInt -> IO (Either Errno CInt)
-errorsFromInt r = if r >= 0
-  then pure (Right r)
-  else fmap Left getErrno