diff --git a/util/dist-check b/util/dist-check
index ce63fcc..a24cd15 100755
--- a/util/dist-check
+++ b/util/dist-check
@@ -86,7 +86,7 @@ sh "sudo $make install";
 sh "sudo cp /tmp/nginx.conf $prefix/nginx/conf/nginx.conf";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep $ver";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep -v 'stream_proxy'";
-#system "sudo killall nginx > /dev/null 2>&1";
+#system "[ -f '$prefix/nginx/logs/nginx.pid' ] && sudo kill \$(cat '$prefix/nginx/logs/nginx.pid') > /dev/null 2>&1";
 sh "sudo $prefix/nginx/sbin/nginx";
 sh "curl -si localhost/lua|grep $lua";
 sh "curl -si localhost/lua|grep $ver";
@@ -108,7 +108,7 @@ sh "sudo $prefix/nginx/sbin/nginx -sstop";
 #sh "$prefix/nginx/sbin/nginx -V 2>\&1", $ver;
 #sh "$prefix/nginx/sbin/nginx -V 2>\&1", "--with-stream", 1;
 #sh "$prefix/nginx/sbin/nginx -V 2>\&1", "--with-dtrace-probes";
-#system "sudo killall nginx > /dev/null 2>&1";
+#system "[ -f '$prefix/nginx/logs/nginx.pid' ] && sudo kill \$(cat '$prefix/nginx/logs/nginx.pid') > /dev/null 2>&1";
 #sh "sudo $prefix/nginx/sbin/nginx";
 #sh "curl -si localhost/lua|grep $lua";
 #sh "curl -si localhost/lua|grep $ver";
@@ -129,7 +129,7 @@ sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep $ver";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep '\\--without-http_gzip_module'";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep -v -q '\\--with-http_ssl_module'";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep '\\--without-pcre'";
-system "sudo killall nginx > /dev/null 2>&1";
+system "[ -f '$prefix/nginx/logs/nginx.pid' ] && sudo kill \$(cat '$prefix/nginx/logs/nginx.pid') > /dev/null 2>&1";
 if (0) {
 sh "sudo $prefix/nginx/sbin/nginx";
 sh "curl -si localhost/lua|grep $lua";
@@ -152,7 +152,7 @@ sh "sudo $make install";
 sh "sudo cp /tmp/nginx.conf $prefix/nginx/conf/nginx.conf";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep $ver";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep '\\--with-threads'";
-system "sudo killall nginx > /dev/null 2>&1";
+system "[ -f '$prefix/nginx/logs/nginx.pid' ] && sudo kill \$(cat '$prefix/nginx/logs/nginx.pid') > /dev/null 2>&1";
 sh "sudo $prefix/nginx/sbin/nginx";
 sh "curl -si localhost/lua|grep $lua";
 sh "curl -si localhost/lua|grep $ver";
@@ -171,7 +171,7 @@ sh "sudo $make install > /dev/null";
 sh "sudo cp /tmp/nginx.conf $prefix/nginx/conf/nginx.conf";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep $ver";
 #sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep '\\--with-no-pool-patch'";
-system "sudo killall nginx > /dev/null 2>&1";
+system "[ -f '$prefix/nginx/logs/nginx.pid' ] && sudo kill \$(cat '$prefix/nginx/logs/nginx.pid') > /dev/null 2>&1";
 sh "sudo $prefix/nginx/sbin/nginx";
 sh "curl -si localhost/lua|grep $lua";
 sh "curl -si localhost/lua|grep $ver";
@@ -190,7 +190,7 @@ sh "$make -j$jobs";
 sh "sudo $make install";
 sh "sudo cp /tmp/nginx.conf $prefix/nginx/conf/nginx.conf";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep $ver";
-system "sudo killall nginx > /dev/null 2>&1";
+system "[ -f '$prefix/nginx/logs/nginx.pid' ] && sudo kill \$(cat '$prefix/nginx/logs/nginx.pid') > /dev/null 2>&1";
 sh "sudo $prefix/nginx/sbin/nginx";
 sh "curl -si localhost/lua|grep $lua";
 sh "curl -si localhost/lua|grep $ver";
@@ -215,7 +215,7 @@ sh "sudo $make install";
 sh "sudo cp /tmp/nginx.conf $prefix/nginx/conf/nginx.conf";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep $ver";
 sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep '\\--with-debug'";
-system "sudo killall nginx > /dev/null 2>&1";
+system "[ -f '$prefix/nginx/logs/nginx.pid' ] && sudo kill \$(cat '$prefix/nginx/logs/nginx.pid') > /dev/null 2>&1";
 sh "sudo $prefix/nginx/sbin/nginx";
 sh "curl -si localhost/lua|grep $lua";
 sh "curl -si localhost/lua|grep $ver";
@@ -234,7 +234,7 @@ sh "sudo $prefix/nginx/sbin/nginx -sstop";
 #sh "sudo cp /tmp/nginx.conf $prefix/nginx/conf/nginx.conf";
 #sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep $ver";
 #sh "$prefix/nginx/sbin/nginx -V 2>&1 |grep '\\--with-dtrace-probes'";
-#system "sudo killall nginx > /dev/null 2>&1";
+#system "[ -f '$prefix/nginx/logs/nginx.pid' ] && sudo kill \$(cat '$prefix/nginx/logs/nginx.pid') > /dev/null 2>&1";
 #sh "sudo $prefix/nginx/sbin/nginx";
 #sh "curl -si localhost/lua|grep $lua";
 #sh "curl -si localhost/lua|grep $ver";