diff --git a/README.md b/README.md
index 3277a56b..d759d66f 100644
--- a/README.md
+++ b/README.md
@@ -330,13 +330,14 @@ ## Supported network services
 
   Please, remember that this is just a convention:
 
-  > **Warning**
+  > [!WARNING]
   >
   > The Internet Assigned Numbers Authority (IANA) is responsible for maintaining
   > the official assignments of port numbers for specific uses. <br>
   > However, many unofficial uses of well-known port numbers occur in practice.
   
-  The full list of services is generated from Nmap's service collection and is available in the file `services.txt`.
+  Sniffnet's list of services is generated from [Nmap's service collection](https://nmap.org/book/nmap-services.html)
+  and is available in the file [`services.txt`](https://raw.githubusercontent.com/GyulyVGC/sniffnet/main/services.txt).
 
 </details>
 
diff --git a/build.rs b/build.rs
index 2b94d460..23623522 100644
--- a/build.rs
+++ b/build.rs
@@ -31,8 +31,8 @@ fn set_icon() {
 }
 
 fn build_services_phf() {
-    let path = Path::new(&env::var("OUT_DIR").unwrap()).join("services.rs");
-    let mut file = BufWriter::new(File::create(path).unwrap());
+    let out_path = Path::new(&env::var("OUT_DIR").unwrap()).join("services.rs");
+    let mut output = BufWriter::new(File::create(out_path).unwrap());
 
     let mut services_map = phf_codegen::Map::new();
 
@@ -53,7 +53,7 @@ fn build_services_phf() {
     assert_eq!(num_entries, 12066);
 
     writeln!(
-        &mut file,
+        &mut output,
         "#[allow(clippy::unreadable_literal)]\n\
         static SERVICES: phf::Map<ServiceQuery, Service> = {};",
         services_map.build()
diff --git a/src/networking/types/protocol.rs b/src/networking/types/protocol.rs
index eb812929..5e2c1781 100644
--- a/src/networking/types/protocol.rs
+++ b/src/networking/types/protocol.rs
@@ -1,3 +1,5 @@
+// WARNING: this file is imported in build.rs
+
 /// Enum representing the possible observed values of protocol.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 #[allow(clippy::upper_case_acronyms)]
diff --git a/src/networking/types/service_query.rs b/src/networking/types/service_query.rs
index 716113ed..514cc89a 100644
--- a/src/networking/types/service_query.rs
+++ b/src/networking/types/service_query.rs
@@ -1,3 +1,5 @@
+// WARNING: this file is imported in build.rs
+
 use std::hash::Hash;
 
 /// Used to query the phf services map (key of the map).