diff --git a/glicid/packages/mpi.scm b/glicid/packages/mpi.scm
index 4f95e29..2dcdc62 100644
--- a/glicid/packages/mpi.scm
+++ b/glicid/packages/mpi.scm
@@ -1,4 +1,5 @@
 (define-module (glicid packages mpi)
+  #:use-module (srfi srfi-1) ; lset-difference
   #:use-module (guix packages)
   #:use-module (guix download)
   #:use-module ((gnu packages mpi)
@@ -10,6 +11,7 @@
   #:use-module (guix gexp)
   #:use-module (gnu packages))
 
+
 ;(define-public openmpi-glicid-internal-pmix
 ;  (package/inherit gnu:openmpi-4
 ;    (name "openmpi-glicid")
@@ -95,19 +97,27 @@
 
     ))
 
-(define-public openmpi-glicid-unpatched-pmixv4
+(define-public openmpi-unpatched-glicid-pmixv4
   (package/inherit openmpi-unpatched-glicid
-    (name "openmpi-glicid-unpatched-pmixv4")
+    (name "openmpi-unpatched-glicid-pmixv4")
     (arguments (substitute-keyword-arguments (package-arguments
                                               openmpi-unpatched-glicid)
                  ((#:configure-flags flags)
-                  #~(append #$flags
+                  #~(append 
+; (`lset-difference `eq? #$flags (list "--with-pmix=internal"))
+;                     (delete "--with-pmix=internal" (delete "--enable-openib-control-hdr-padding" #$flags))
+;                      (lset-difference eq? (list "-with-pmix=internal" "--enable-openib-control-hdr-padding") #$flags)
+;                            #$flags
+                      (delete "--with-pmix=internal"
+                       (delete "--enable-openib-dynamic-sl"
+                        (delete "--enable-openib-udcm"
+                         (delete "--enable-openib-rdmacm"
+                          (delete "--enable-openib-rdmacm-ibaddr"
+                           (delete "--enable-openib-control-hdr-padding" #$flags))))))
                             (list ;original flags has --with-pmix=internal, we should remove it but last --with-pmix is the one taken into account.
                                   (string-append "--with-pmix="
                                                  #$(this-package-input
-                                                    "openpmix"))
-                                  (string-append "--with-prrte="
-                                                 #$(this-package-input "prrte"))) ;#$flags
+                                                    "openpmix")))
                             ))))
     (inputs (modify-inputs (package-inputs openmpi-unpatched-glicid)
               (append openpmix) ; because we use pmix4 now, openpmi-4 defaults to internal pmix3
@@ -116,3 +126,4 @@
 
     ))
 
+openmpi-unpatched-glicid-pmixv4