Try manage it this way as SC does not have epel for 8 yet

elmobp · elmobp · commit 29da63eb04fe · 2019-11-20T12:33:39.000+08:00
diff --git a/manifests/install.pp b/manifests/install.pp
@@ -34,7 +34,7 @@
     default => $python::virtualenv,
   }
 
-  $virtualenv_package = $python::virtualenv_package ? {
+  $install_virtualenv_package = $python::virtualenv_package ? {
     undef   => "${python}-virtualenv",
     default => $python::virtualenv_package
   }
@@ -61,7 +61,7 @@
 
   package { 'virtualenv':
     ensure  => $venv_ensure,
-    name    => "${python}-virtualenv",
+    name    => $install_virtualenv_package,
     require => Package['python'],
   }
 

Original file line number	Diff line number	Diff line change
`@@ -34,7 +34,7 @@`
`34`	`34`	`default => $python::virtualenv,`
`35`	`35`	`}`
`36`	`36`
`37`		`- $virtualenv_package = $python::virtualenv_package ? {`
	`37`	`+ $install_virtualenv_package = $python::virtualenv_package ? {`
`38`	`38`	`undef => "${python}-virtualenv",`
`39`	`39`	`default => $python::virtualenv_package`
`40`	`40`	`}`
`@@ -61,7 +61,7 @@`
`61`	`61`
`62`	`62`	`package { 'virtualenv':`
`63`	`63`	`ensure => $venv_ensure,`
`64`		`- name => "${python}-virtualenv",`
	`64`	`+ name => $install_virtualenv_package,`
`65`	`65`	`require => Package['python'],`
`66`	`66`	`}`
`67`	`67`