diff --git a/build/find_normal.rs b/build/find_normal.rs
index ff8d4a8..cf71691 100644
--- a/build/find_normal.rs
+++ b/build/find_normal.rs
@@ -44,67 +44,40 @@ pub fn probe_lua() -> PathBuf {
     // Find using `pkg-config`
 
     #[cfg(feature = "lua54")]
-    {
-        let mut lua = pkg_config::Config::new()
-            .range_version((Bound::Included("5.4"), Bound::Excluded("5.5")))
-            .cargo_metadata(need_lua_lib)
-            .probe("lua");
-
-        if lua.is_err() {
-            lua = pkg_config::Config::new()
-                .cargo_metadata(need_lua_lib)
-                .probe("lua5.4");
-        }
-
-        lua.unwrap().include_paths[0].clone()
-    }
-
+    let (incl_bound, excl_bound, alt_probe, ver) = ("5.4", "5.5", "lua5.4", "5.4");
     #[cfg(feature = "lua53")]
-    {
-        let mut lua = pkg_config::Config::new()
-            .range_version((Bound::Included("5.3"), Bound::Excluded("5.4")))
-            .cargo_metadata(need_lua_lib)
-            .probe("lua");
-
-        if lua.is_err() {
-            lua = pkg_config::Config::new()
-                .cargo_metadata(need_lua_lib)
-                .probe("lua5.3");
-        }
-
-        lua.unwrap().include_paths[0].clone()
-    }
-
+    let (incl_bound, excl_bound, alt_probe, ver) = ("5.3", "5.4", "lua5.3", "5.3");
     #[cfg(feature = "lua52")]
-    {
-        let mut lua = pkg_config::Config::new()
-            .range_version((Bound::Included("5.2"), Bound::Excluded("5.3")))
-            .cargo_metadata(need_lua_lib)
-            .probe("lua");
-
-        if lua.is_err() {
-            lua = pkg_config::Config::new()
-                .cargo_metadata(need_lua_lib)
-                .probe("lua5.2");
-        }
-
-        lua.unwrap().include_paths[0].clone()
-    }
-
+    let (incl_bound, excl_bound, alt_probe, ver) = ("5.2", "5.3", "lua5.2", "5.2");
     #[cfg(feature = "lua51")]
+    let (incl_bound, excl_bound, alt_probe, ver) = ("5.1", "5.2", "lua5.1", "5.1");
+
+    #[cfg(any(
+        feature = "lua54",
+        feature = "lua53",
+        feature = "lua52",
+        feature = "lua51"
+    ))]
     {
         let mut lua = pkg_config::Config::new()
-            .range_version((Bound::Included("5.1"), Bound::Excluded("5.2")))
+            .range_version((Bound::Included(incl_bound), Bound::Excluded(excl_bound)))
             .cargo_metadata(need_lua_lib)
             .probe("lua");
 
         if lua.is_err() {
             lua = pkg_config::Config::new()
                 .cargo_metadata(need_lua_lib)
-                .probe("lua5.1");
+                .probe(alt_probe);
         }
 
-        lua.unwrap().include_paths[0].clone()
+        lua.expect(&format!("cannot find Lua {} using `pkg-config`", ver))
+            .include_paths
+            .get(0)
+            .expect(&format!(
+                "cannot find Lua {} include paths using `pkg-config`",
+                ver
+            ))
+            .clone()
     }
 
     #[cfg(feature = "luajit")]
@@ -114,6 +87,10 @@ pub fn probe_lua() -> PathBuf {
             .cargo_metadata(need_lua_lib)
             .probe("luajit");
 
-        lua.unwrap().include_paths[0].clone()
+        lua.expect("cannot find LuaJIT using `pkg-config`")
+            .include_paths
+            .get(0)
+            .expect("cannot find LuaJIT include paths using `pkg-config`")
+            .clone()
     }
 }