diff --git a/util/dist-check b/util/dist-check
index ed2d22c..4f705b4 100755
--- a/util/dist-check
+++ b/util/dist-check
@@ -7,6 +7,7 @@ use Getopt::Std qw(getopts);
 use Cwd qw/cwd/;
 
 sub sh ($);
+sub cleanup ();
 sub write_config_file ($);
 
 my %opts;
@@ -69,7 +70,7 @@ write_config_file "/tmp/nginx.conf";
 
 warn "=== Without FFI ===\n";
 $prefix = "/usr/local/openresty-noffi";
-sh "sudo rm -rf $prefix/lualib $prefix/luajit $prefix/bin $prefix/lua $prefix/nginx/sbin $prefix/nginx/html";
+cleanup();
 unless ($opts{f}) {
     sh "./configure $cfg_opts --with-cc-opt='-DNGX_LUA_NO_FFI_API' --prefix=$prefix -j$jobs > /dev/null";
 }
@@ -87,7 +88,7 @@ sh "sudo $prefix/nginx/sbin/nginx -sstop";
 
 warn "=== --with-stream ===\n";
 $prefix = "/usr/local/openresty-stream";
-sh "sudo rm -rf $prefix/lualib $prefix/luajit $prefix/bin $prefix/lua $prefix/nginx/sbin $prefix/nginx/html";
+cleanup();
 unless ($opts{f}) {
     sh "./configure $cfg_opts --with-stream --prefix=$prefix -j$jobs > /dev/null";
 }
@@ -106,7 +107,7 @@ sh "sudo $prefix/nginx/sbin/nginx -sstop";
 
 warn "=== --with-stream + dtrace static probes ===\n";
 $prefix = "/usr/local/openresty-stream-usdt";
-sh "sudo rm -rf $prefix/lualib $prefix/luajit $prefix/bin $prefix/lua $prefix/nginx/sbin $prefix/nginx/html";
+cleanup();
 unless ($opts{f}) {
     sh "./configure $cfg_opts --with-dtrace-probes --with-stream --prefix=$prefix -j$jobs > /dev/null";
 }
@@ -126,7 +127,7 @@ sh "sudo $prefix/nginx/sbin/nginx -sstop";
 
 warn "=== Without Gzip/SSL/PCRE ===\n";
 $prefix = "/usr/local/openresty-nogzip";
-sh "sudo rm -rf $prefix/lualib $prefix/luajit $prefix/bin $prefix/lua $prefix/nginx/sbin $prefix/nginx/html";
+cleanup();
 unless ($opts{f}) {
     sh "./configure $cfg_opts --without-http_rewrite_module --without-http_ssl_module --without-pcre --without-http_gzip_module --prefix=$prefix -j$jobs > /dev/null";
 }
@@ -149,7 +150,7 @@ $cfg_opts .= " --with-http_iconv_module";
 
 warn "\n=== --with-threads ===\n";
 $prefix = "/usr/local/openresty-threads";
-sh "sudo rm -rf $prefix/lualib $prefix/luajit $prefix/bin $prefix/lua $prefix/nginx/sbin $prefix/nginx/html";
+cleanup();
 unless ($opts{f}) {
     sh "./configure $cfg_opts --with-threads --prefix=$prefix -j$jobs > /dev/null";
 }
@@ -168,7 +169,7 @@ sh "sudo $prefix/nginx/sbin/nginx -sstop";
 
 warn "\n=== No Pool Build ===\n";
 $prefix = "/usr/local/openresty-nopool";
-sh "sudo rm -rf $prefix/lualib $prefix/luajit $prefix/bin $prefix/lua $prefix/nginx/sbin $prefix/nginx/html";
+cleanup();
 unless ($opts{f}) {
     sh "./configure --with-no-pool-patch $cfg_opts --prefix=$prefix -j$jobs > /dev/null";
 }
@@ -188,7 +189,7 @@ sh "sudo $prefix/nginx/sbin/nginx -sstop";
 
 warn "\n=== Normal Build ===\n";
 $prefix = "/usr/local/openresty";
-sh "sudo rm -rf $prefix/lualib $prefix/luajit $prefix/bin $prefix/lua $prefix/nginx/sbin $prefix/nginx/html";
+cleanup();
 unless ($opts{f}) {
     sh "./configure $cfg_opts -j$jobs > /dev/null";
 }
@@ -202,11 +203,13 @@ sh "curl -si localhost/lua|grep $lua";
 sh "curl -si localhost/lua|grep $ver";
 sh "curl -si localhost/cjson|grep 'json.safe: '";
 sh qq{$prefix/bin/resty -e 'ngx.say("Hello World!")'|grep 'Hello World'};
+sh qq{$prefix/bin/restydoc -s listen | grep 'configures the port to accept HTTP/2'};
+sh qq{$prefix/bin/restydoc opm | grep -E '^Status\$'};
 sh "sudo $prefix/nginx/sbin/nginx -sstop";
 
 warn "\n=== Debug Build ===\n";
 $prefix = "/usr/local/openresty-debug";
-sh "sudo rm -rf $prefix/lualib $prefix/luajit $prefix/bin $prefix/lua $prefix/nginx/sbin $prefix/nginx/html";
+cleanup();
 unless ($opts{f}) {
     my $more_cfg_opts = '';
     if ($lua eq 'LuaJIT') {
@@ -229,7 +232,7 @@ sh "sudo $prefix/nginx/sbin/nginx -sstop";
 
 warn "\n=== DTrace Build ===\n";
 $prefix = "/usr/local/openresty-dtrace";
-sh "sudo rm -rf $prefix/lualib $prefix/luajit $prefix/bin $prefix/lua $prefix/nginx/sbin $prefix/nginx/html";
+cleanup();
 unless ($opts{f}) {
     sh "./configure $cfg_opts --with-dtrace-probes --prefix=$prefix -j$jobs > /dev/null";
 }
@@ -258,6 +261,11 @@ sub sh ($) {
     system($cmd) == 0 or die "Command \"$cmd\" failed";
 }
 
+sub cleanup () {
+    sh "sudo rm -rf $prefix/lualib $prefix/luajit $prefix/bin $prefix/lua $prefix/nginx/sbin $prefix/nginx/html"
+       . " $prefix/site $prefix/pod $prefix/resty.index";
+}
+
 __DATA__
 
 user  nobody;