diff --git a/src/core.c/CompUnit/PrecompilationStore/File.pm6 b/src/core.c/CompUnit/PrecompilationStore/File.pm6
index 1708a5a082b..5edacb4c3a9 100644
--- a/src/core.c/CompUnit/PrecompilationStore/File.pm6
+++ b/src/core.c/CompUnit/PrecompilationStore/File.pm6
@@ -309,7 +309,7 @@ class CompUnit::PrecompilationStore::File
       Str:D :$extension = ''
     ) {
         my &rename-block = { $path.rename(self!file($compiler-id, $precomp-id, :$extension)); };
-        if $*DISTRO.is-win {
+        if Rakudo::Internals.IS-WIN {
             # If the rename attempts don't succeed, we'll end up
             # trying again one more time but not catching any failures.
             return if try-rename-n-times(&rename-block, 10);
@@ -328,7 +328,7 @@ class CompUnit::PrecompilationStore::File
             $precomp-file.rename(self!file($compiler-id, $precomp-id));
             self.remove-from-cache($precomp-id);
         };
-        if $*DISTRO.is-win {
+        if Rakudo::Internals.IS-WIN {
             # If the rename attempts don't succeed, we'll end up
             # trying again one more time but not catching any failures.
             return if try-rename-n-times(&rename-block, 10);
@@ -344,7 +344,7 @@ class CompUnit::PrecompilationStore::File
         my $repo-id-file := self!file($compiler-id, $precomp-id, :extension<.repo-id.tmp>);
         $repo-id-file.spurt($repo-id);
         my &rename-block = { $repo-id-file.rename(self!file($compiler-id, $precomp-id, :extension<.repo-id>)); };
-        if $*DISTRO.is-win {
+        if Rakudo::Internals.IS-WIN {
             # If the rename attempts don't succeed, we'll end up
             # trying again one more time but not catching any failures.
             return if try-rename-n-times(&rename-block, 10);
diff --git a/src/core.c/REPL.pm6 b/src/core.c/REPL.pm6
index fc7bb7c581d..6cf058d02f1 100644
--- a/src/core.c/REPL.pm6
+++ b/src/core.c/REPL.pm6
@@ -44,7 +44,7 @@ do {
         my &add_history = $WHO<&add_history>;
         my $Readline = try { require Readline }
         my $read = $Readline.new;
-        if ! $*DISTRO.is-win {
+        if !Rakudo::Internals.IS-WIN {
             $read.read-init-file("/etc/inputrc");
             $read.read-init-file(%*ENV<INPUTRC> // "~/.inputrc");
         }
@@ -238,7 +238,7 @@ do {
                 say 'Continuing without tab completions or line editor';
                 say 'You may want to consider using rlwrap for simple line editor functionality';
             }
-            elsif !$*DISTRO.is-win and !( %*ENV<_>:exists and %*ENV<_>.ends-with: 'rlwrap' ) {
+            elsif !Rakudo::Internals.IS-WIN and !( %*ENV<_>:exists and %*ENV<_>.ends-with: 'rlwrap' ) {
                 say 'You may want to `zef install Readline` or `zef install Linenoise` or use rlwrap for a line editor';
             }
             say '';
@@ -321,7 +321,7 @@ do {
 
             say $no-exit
               ?? "Type 'exit' to leave"
-              !! $*DISTRO.is-win
+              !! Rakudo::Internals.IS-WIN
                 ?? "To exit type 'exit' or '^Z'"
                 !! "To exit type 'exit' or '^D'";