diff --git a/tools/build/js_core_sources b/tools/build/js_core_sources
index eaa00075a32..4a0fd6ad061 100644
--- a/tools/build/js_core_sources
+++ b/tools/build/js_core_sources
@@ -81,6 +81,7 @@ src/core/Rational.pm
 src/core/Rat.pm
 src/core/Complex.pm
 src/core/Backtrace.pm
+src/core/StrDistance.pm
 src/core/Exception.pm
 src/core/Failure.pm
 src/core/Match.pm
@@ -148,8 +149,8 @@ src/core/IO/Socket.pm
 src/core/IO/Socket/INET.pm
 src/core/IO/Socket/Async.pm
 src/core/Proc.pm
-src/core/Proc/Async.pm
 src/core/signals.pm
+src/core/Proc/Async.pm
 src/core/Systemic.pm
 src/core/VM.pm
 src/core/Distro.pm
@@ -180,7 +181,6 @@ src/core/CompUnit/Repository/Perl5.pm
 src/core/CompUnit/Repository/Unknown.pm
 src/core/Argfiles.pm
 src/core/Process.pm
-src/core/StrDistance.pm
 src/core/Slang.pm
 src/core/Metamodel/Primitives.pm
 src/core/REPL.pm