diff --git a/Jenkinsfile b/Jenkinsfile
index 4962c2b..22f0afd 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -88,14 +88,28 @@ pipeline {
                       "\$@" >"\$log_file" 2>&1 &
                       cmd_pid=\$!
                       cmd_status=0
-                      tail --pid="\$cmd_pid" -n +1 -f "\$log_file" &
-                      tail_pid=\$!
+                      last_line=0
                       while kill -0 "\$cmd_pid" >/dev/null 2>&1; do
-                        echo "[heartbeat] API multi-arch build still running at \$(date -u +%Y-%m-%dT%H:%M:%SZ)"
+                        if [ -f "\$log_file" ]; then
+                          total_lines=\$(wc -l < "\$log_file" 2>/dev/null || echo 0)
+                        else
+                          total_lines=0
+                        fi
+                        if [ "\$total_lines" -gt "\$last_line" ]; then
+                          sed -n "\$((last_line + 1)),\${total_lines}p" "\$log_file"
+                          last_line=\$total_lines
+                        else
+                          echo "[heartbeat] API multi-arch build still running at \$(date -u +%Y-%m-%dT%H:%M:%SZ)"
+                        fi
                         sleep 20
                       done
                       wait "\$cmd_pid" || cmd_status=\$?
-                      wait "\$tail_pid" >/dev/null 2>&1 || true
+                      if [ -f "\$log_file" ]; then
+                        total_lines=\$(wc -l < "\$log_file" 2>/dev/null || echo 0)
+                        if [ "\$total_lines" -gt "\$last_line" ]; then
+                          sed -n "\$((last_line + 1)),\${total_lines}p" "\$log_file"
+                        fi
+                      fi
                       if [ "\$cmd_status" -ne 0 ]; then
                         echo "[heartbeat] API multi-arch build failed with exit code \$cmd_status"
                       fi
@@ -150,14 +164,28 @@ pipeline {
                       "\$@" >"\$log_file" 2>&1 &
                       cmd_pid=\$!
                       cmd_status=0
-                      tail --pid="\$cmd_pid" -n +1 -f "\$log_file" &
-                      tail_pid=\$!
+                      last_line=0
                       while kill -0 "\$cmd_pid" >/dev/null 2>&1; do
-                        echo "[heartbeat] Web multi-arch build still running at \$(date -u +%Y-%m-%dT%H:%M:%SZ)"
+                        if [ -f "\$log_file" ]; then
+                          total_lines=\$(wc -l < "\$log_file" 2>/dev/null || echo 0)
+                        else
+                          total_lines=0
+                        fi
+                        if [ "\$total_lines" -gt "\$last_line" ]; then
+                          sed -n "\$((last_line + 1)),\${total_lines}p" "\$log_file"
+                          last_line=\$total_lines
+                        else
+                          echo "[heartbeat] Web multi-arch build still running at \$(date -u +%Y-%m-%dT%H:%M:%SZ)"
+                        fi
                         sleep 20
                       done
                       wait "\$cmd_pid" || cmd_status=\$?
-                      wait "\$tail_pid" >/dev/null 2>&1 || true
+                      if [ -f "\$log_file" ]; then
+                        total_lines=\$(wc -l < "\$log_file" 2>/dev/null || echo 0)
+                        if [ "\$total_lines" -gt "\$last_line" ]; then
+                          sed -n "\$((last_line + 1)),\${total_lines}p" "\$log_file"
+                        fi
+                      fi
                       if [ "\$cmd_status" -ne 0 ]; then
                         echo "[heartbeat] Web multi-arch build failed with exit code \$cmd_status"
                       fi