Try_files on windows

We use nginx in production (linux) and as development machines on
The following is on Windows (I didn’t test on linux),
case 1: try_files $uri $uri/index.php; → works fine
and shows the page index.php
case 2: try_files $uri $uri/index.php $bootstrap; → shows the
$bootstrap page even if $uri/index.php exists
case 3: try_files $uri $bootstrap; → works
fine and shows $bootstrap as it should

I can’t get it to work in case 2. I also tried index index.php; but it
still doesn’t work
It seems like a pretty basic requirement and I don’t understand why it
wouldn’t work fairly simply. Has anyone else encountered this problem
and enlighten me whether it’s a bug or am I doing something wrong?

In case someone wishes to see the full setup, here it is

server {
listen 80;
server_name ~^.+alpha.+$ ;

set $server d:/BeoAppSrv ;
set $bootstrap /public/alpha/bootstrap.php ;

root $server$myroot ;

access_log ./…/…/var/log/nginx/http-alpha.log debug0 ;
index index.php;# index.html index.htm index.php ;

if ($host ~*
“^([^.]+(.[^.]+)).alpha.local.((.).(com|net|org)(..*)?)$”) {
set $dom $3;
set $sub $1;

if ($host ~* “^alpha.local.(([^.]+).((com|net|org)(..*)?$))”) {
set $dom $1;
set $sub www;

    set $myroot /public/alpha/sites/$dom/$sub/htdocs ;

    location ~

gzip on;
gzip_comp_level 2;
gzip_vary on;
gzip_proxied any;
gzip_types text/plain text/xml text/css application/x-javascript;
expires 365d;

location ^~ /ui/ { alias ./…/…/public/ui/; }

try_files $uri $uri/index.php $bootstrap?$uri&$args;

location ~ .php$ {
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME
include fastcgi_params;

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