diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 `lua` uses [PVP Versioning][1].
 
+## lua 2.0.0.1
+
+Released 2021-10-30.
+
+- Only install includes when using the Lua code shipped with the
+  package. Cabal no longer tries to install the header files if a
+  system-wide installation is used.
+
 ## lua 2.0.0
 
 Release pending.
diff --git a/lua.cabal b/lua.cabal
--- a/lua.cabal
+++ b/lua.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.2
 name:                lua
-version:             2.0.0
+version:             2.0.0.1
 synopsis:            Lua, an embeddable scripting language
 description:         This package provides bindings and types to bridge
                      Haskell and <https://www.lua.org/ Lua>.
@@ -144,9 +144,6 @@
   includes:            lua.h
                      , luaconf.h
                      , lauxlib.h
-  install-includes:    lua.h
-                     , luaconf.h
-                     , lauxlib.h
   if flag(system-lua) || flag(pkg-config)
     if flag(pkg-config)
       pkgconfig-depends: lua5.3
@@ -154,6 +151,9 @@
       extra-libraries:   lua
   else
     include-dirs:        cbits/lua-5.3.6
+    install-includes:    lua.h
+                       , luaconf.h
+                       , lauxlib.h
     c-sources:           cbits/lua-5.3.6/lapi.c
                        , cbits/lua-5.3.6/lcode.c
                        , cbits/lua-5.3.6/lctype.c