diff --git a/.changeset/few-rice-enjoy.md b/.changeset/few-rice-enjoy.md
new file mode 100644
index 00000000000..842fc546137
--- /dev/null
+++ b/.changeset/few-rice-enjoy.md
@@ -0,0 +1,5 @@
+---
+"@atproto/lex-cli": patch
+---
+
+Improve compatibility with Windows runtimes.
diff --git a/packages/lex-cli/src/codegen/lex-gen.ts b/packages/lex-cli/src/codegen/lex-gen.ts
index 271e212a4ba..bd7071b1c05 100644
--- a/packages/lex-cli/src/codegen/lex-gen.ts
+++ b/packages/lex-cli/src/codegen/lex-gen.ts
@@ -1,4 +1,4 @@
-import { relative as getRelativePath } from 'node:path'
+import { relative as getRelativePath } from 'node:path/posix'
 import { SourceFile, VariableDeclarationKind } from 'ts-morph'
 import {
   LexArray,