diff --git a/nac3core/build.rs b/nac3core/build.rs
index 2c36a3db..a032bb93 100644
--- a/nac3core/build.rs
+++ b/nac3core/build.rs
@@ -38,11 +38,12 @@ fn main() {
         })
         .unwrap();
 
-    let output = std::str::from_utf8(&output.stdout).unwrap();
+    // https://github.com/rust-lang/regex/issues/244
+    let output = std::str::from_utf8(&output.stdout).unwrap().replace("\r\n", "\n");
     let mut filtered_output = String::with_capacity(output.len());
 
     let regex_filter = regex::Regex::new(r"(?ms:^define.*?\}$)|(?m:^declare.*?$)").unwrap();
-    for f in regex_filter.captures_iter(output) {
+    for f in regex_filter.captures_iter(&output) {
         assert!(f.len() == 1);
         filtered_output.push_str(&f[0]);
         filtered_output.push('\n');