diff --git a/flake.lock b/flake.lock
index 68efe45..8be6d2f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "flake-utils": {
       "locked": {
-        "lastModified": 1637014545,
-        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
+        "lastModified": 1644229661,
+        "narHash": "sha256-1YdnJAsNy69bpcjuoKdOYQX0YxZBiCYZo4Twxerqv7k=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
+        "rev": "3cecb5b042f7f209c56ffd8371b2711a290ec797",
         "type": "github"
       },
       "original": {
@@ -17,11 +17,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1639488789,
-        "narHash": "sha256-Ey12CBni1jlEGoW4eH4X0hugWs25MxHMcNH4N8VVX0U=",
+        "lastModified": 1648109818,
+        "narHash": "sha256-Cz/VvpkiHCp08IKAKq8kHLqV8/svwqIQ5JK8zDft8i8=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "ce635e9dca8f7e2bfab19a3667d7e697c019c68b",
+        "rev": "f2aa493e616a754c95e5af617a7d7f0f3ea67972",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index ac4a2a7..88fa690 100644
--- a/flake.nix
+++ b/flake.nix
@@ -117,9 +117,9 @@
 
           buildTypes = { 
             lua5_1 = [pkgs.lua5_1 pkgs.lua51Packages.luaposix (buildExtensions pkgs.lua51Packages)];
-            lua5_2 = [pkgs.lua5_2 pkgs.lua52Packages.luaposix (buildExtensions pkgs.lua51Packages)];
-            lua5_3 = [pkgs.lua5_3 pkgs.lua53Packages.luaposix (buildExtensions pkgs.lua51Packages)];
-            lua5_4 = [pkgs.lua5_3 (luaposix35 mylua5_4) (buildExtensions mylua5_4)];
+            lua5_2 = [pkgs.lua5_2 pkgs.lua52Packages.luaposix (buildExtensions pkgs.lua52Packages)];
+            lua5_3 = [pkgs.lua5_3 pkgs.lua53Packages.luaposix (buildExtensions pkgs.lua53Packages)];
+            lua5_4 = [pkgs.lua5_4 (luaposix35 mylua5_4) (buildExtensions mylua5_4.pkgs)];
           };
         in
         let
diff --git a/lsyncd.c b/lsyncd.c
index 8fac8ac..31540f2 100644
--- a/lsyncd.c
+++ b/lsyncd.c
@@ -488,8 +488,8 @@ static void safeexit (lua_State *L, int exitcode) {
 	lua_remove( L, -2 );
 	lua_pushinteger(L, exitcode);
     lua_call(L, 2, 1);
-	if (lua_isinteger(L, -1)) {
-		exitcode = luaL_checkinteger(L, -1);
+	if (lua_isnumber(L, -1)) {
+		exitcode = luaL_checkint(L, -1);
 	}
     exit(exitcode);
 }
@@ -1131,8 +1131,8 @@ l_now(lua_State *L)
 static int
 l_kill( lua_State *L )
 {
-	pid_t pid = luaL_checkinteger( L, 1 );
-	int sig = luaL_checkinteger( L, 2 );
+	pid_t pid = luaL_checkint( L, 1 );
+	int sig = luaL_checkint( L, 2 );
 
 	int rv = kill(pid, sig );
 
@@ -1692,7 +1692,7 @@ l_readdir( lua_State *L )
 int
 l_terminate( lua_State *L )
 {
-	int exitcode = luaL_checkinteger( L, 1 );
+	int exitcode = luaL_checkint( L, 1 );
 
 	exit( exitcode );