diff --git a/src/lib/lockfile/helpers/generate-pnpm-lockfile.ts b/src/lib/lockfile/helpers/generate-pnpm-lockfile.ts
index f3aa30e..34556a5 100644
--- a/src/lib/lockfile/helpers/generate-pnpm-lockfile.ts
+++ b/src/lib/lockfile/helpers/generate-pnpm-lockfile.ts
@@ -91,7 +91,17 @@ export async function generatePnpmLockfile({
        * importer ids in the context of a lockfile.
        */
       ...Object.values(directoryByPackageName),
-    ];
+      /**
+       * Split the path by the OS separator and join it back with the POSIX
+       * separator.
+       *
+       * The importerIds are built from directory names, so Windows Git Bash
+       * environments will have double backslashes in their ids:
+       * "packages\common" vs. "packages/common". Without this split & join, any
+       * packages not on the top-level will have ill-formatted importerIds and
+       * their entries will be missing from the lockfile.importers list.
+       */
+    ].map((x) => x.split(path.sep).join(path.posix.sep));
 
     log.debug("Relevant importer ids:", relevantImporterIds);
 
diff --git a/src/lib/lockfile/helpers/pnpm-map-importer.ts b/src/lib/lockfile/helpers/pnpm-map-importer.ts
index 4f33f31..6dd805e 100644
--- a/src/lib/lockfile/helpers/pnpm-map-importer.ts
+++ b/src/lib/lockfile/helpers/pnpm-map-importer.ts
@@ -49,10 +49,10 @@ function pnpmMapDependenciesLinks(
       return value;
     }
 
-    const relativePath = path.relative(
-      importerPath,
-      directoryByPackageName[key]
-    );
+    // Replace backslashes with forward slashes to support Windows Git Bash
+    const relativePath = path
+      .relative(importerPath, directoryByPackageName[key])
+      .replace(path.sep, path.posix.sep);
 
     return relativePath.startsWith(".")
       ? `link:${relativePath}`