 +
 diff --git a/src/dtrace/stap-nginx b/src/dtrace/stap-nginx
 new file mode 100644
-index 0000000..d53ef66
+index 0000000..37f9367
 --- /dev/null
 +++ b/src/dtrace/stap-nginx
 @@ -0,0 +1,5 @@
 +#!/bin/sh
 +
 +export PATH=NGX_SBIN_DIR:$PATH
-+exec stap -I "NGX_STAP_NGX_PATH" "$@"
++exec stap -I "NGX_TAPSET_DIR" "$@"
 +
 diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
 index 31832ce..9c5ebf3 100644

+	sed -e "s|NGX_SBIN_PATH|$NGX_SBIN_PATH|g" src/dtrace/nginx.stp > $NGX_OBJS${ngx_dirsep}nginx.stp
+
+$NGX_OBJS${ngx_dirsep}stap-nginx: src/dtrace/stap-nginx
+	sed -e "s|NGX_STAP_NGX_PATH|$NGX_STAP_NGX_PATH|g" $ngx_long_cont -e "s|NGX_SBIN_DIR|`dirname $NGX_SBIN_PATH`|g" $ngx_long_cont src/dtrace/stap-nginx > $NGX_OBJS${ngx_dirsep}stap-nginx
+END
+fi
+

diff --git a/README b/README
index 2f68e14..4f2c4a7 100644
--- a/README
+++ b/README
@@ -1,3 +1,40 @@
+This is an Nginx fork that adds dtrace USDT probes.
 
-Documentation is available at http://nginx.org
+This is still under development and not usable yet.
+
+Installation:
+
+    ./configure --with-dtrace-probes \
+        --with-dtrace=/usr/sbin/dtrace \
+        ...
+    make
+    make install
+
+Usage on Linux (with systemtap):
+
+    # make the stap-nginx script visiable in your PATH
+    export PATH=/usr/local/nginx/sbin:$PATH
+
+    # list all the static probes available in your nginx
+    stap-nginx -L 'process("nginx").mark("*")'
+
+    # run the test.stp file
+    stap-nginx test.stp
+
+Sample test.stp file:
+
+    probe begin
+    {
+        print("Tracing.  Hit CTRL-C to stop.\n")
+    }
+
+    probe process("nginx").mark("http-subrequest-start")
+    {
+        printf("uri: %s?%s\n", ngx_http_req_uri($arg1),
+            ngx_http_req_args($arg1))
+    }
+
+For now, only tested on Solaris 11 Express and Fedora Linux 17.
+
+The original Nginx documentation is available at http://nginx.org
 
diff --git a/auto/install b/auto/install
index c2c0ade..bdc0eee 100644
--- a/auto/install
+++ b/auto/install
@@ -16,6 +16,20 @@ END
