Do not bail out when not running on a "supported distro": it will usually work
fine on Guix System.

diff --git a/scripts/mpirun_rochpl.in b/scripts/mpirun_rochpl.in
index 968e5a2..685a69e 100755
--- a/scripts/mpirun_rochpl.in
+++ b/scripts/mpirun_rochpl.in
@@ -50,7 +50,6 @@ supported_distro( )
         true
         ;;
     *)  printf "This script is currently supported on Debian, Linuxmint, Ubuntu, CentOS, RHEL, Fedora and SLES\n"
-        exit 2
         ;;
   esac
 }
diff --git a/scripts/run_rochpl.in b/scripts/run_rochpl.in
index e30c8bb..890cfe1 100755
--- a/scripts/run_rochpl.in
+++ b/scripts/run_rochpl.in
@@ -50,7 +50,6 @@ supported_distro( )
         true
         ;;
     *)  printf "This script is currently supported on Debian, Linuxmint, Ubuntu, CentOS, RHEL, Fedora and SLES\n"
-        exit 2
         ;;
   esac
 }