diff --git a/assets/github_scripts/build.sh b/assets/github_scripts/build.sh
index fc36a1a..f407d8a 100755
--- a/assets/github_scripts/build.sh
+++ b/assets/github_scripts/build.sh
@@ -13,8 +13,8 @@ make -j"$(nproc)" "$@" 2> /tmp/stderr || ERR=$?
 BSIZE=$(stat --printf="%s" lidm)
 HSIZE=$(numfmt --to=iec-i<<<"$BSIZE")B
 WARNS=$(
-  sed -E \
-      's/^([^ ]+\.[ch]):([0-9]+):([0-9]+): ([a-z]+): (.*)$/::\4 file=\1,line=\2,col=\3::\5/' \
+  sed -nE \
+      's/^([^ ]+\.[ch]):([0-9]+):([0-9]+): ([a-z]+): (.*)$/::\4 file=\1,line=\2,col=\3::\5/p' \
       /tmp/stderr
 )
 WARNS_NUM=$({ [[ "$WARNS" == "" ]] && echo 0; } || wc -l <<<"$WARNS")