diff --git a/MODULE.bazel b/MODULE.bazel
index 843dd77095764c2ac2d1966e0e47e0e9e2b1a5ab..ddfaaaa22ad457ab8813d165d41c5321e6b01419 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -2,7 +2,7 @@ module(
     name = "toolchain_utils",
     version = "0.0.0",
     bazel_compatibility = [
-        ">=7.1.0",
+        ">=7.0.0",
     ],
 )
 
diff --git a/toolchain/export/symlink/repository.bzl b/toolchain/export/symlink/repository.bzl
index 672e4eab092dd38d4115a6321b25a3227f81aaf6..a9dcbc9d4a67016435c1d4d506e49ff73e95dd2f 100644
--- a/toolchain/export/symlink/repository.bzl
+++ b/toolchain/export/symlink/repository.bzl
@@ -1,3 +1,5 @@
+load("//toolchain/repository:root.bzl", "root")
+
 visibility("//toolchain/export/...")
 
 DOC = "Symlinks a repository to another."
@@ -11,13 +13,11 @@ ATTRS = {
 
 def implementation(rctx):
     label = rctx.attr.target
-    workspace = label.relative(":REPO.bazel")
-    path = rctx.path(workspace)
-    if not path.exists:
-        fail("Failed to find `{}`, can only symlink repository labels.".format(path, label))
-    target = path.dirname
+    path = root(rctx, label)
+    if not path:
+        fail("Can only symlink repository labels.".format(label))
     rctx.delete(".")
-    rctx.symlink(target, ".")
+    rctx.symlink(path, ".")
 
 symlink = repository_rule(
     doc = DOC,
diff --git a/toolchain/local/select/repository.bzl b/toolchain/local/select/repository.bzl
index 4597e5c6aaa573d3ae0fcccae71a4b8f1e9227d5..57258bb5fe24a1296314256db788043bae9de1f4 100644
--- a/toolchain/local/select/repository.bzl
+++ b/toolchain/local/select/repository.bzl
@@ -1,3 +1,4 @@
+load("//toolchain/repository:root.bzl", "root")
 load("//toolchain:separator.bzl", "SEPARATOR")
 load(":resolve.bzl", resolve = "key")
 
@@ -34,19 +35,17 @@ toolchian_local_select(
 
 def canonical(rctx, label):
     prefix = SEPARATOR.join(rctx.name.split(SEPARATOR)[:-1])
-    return "@@{}{}{}".format(prefix, SEPARATOR, label.removeprefix("@"))
+    return Label("@@{}{}{}".format(prefix, SEPARATOR, label.removeprefix("@")))
 
 def implementation(rctx):
     label = resolve(rctx.attr.map, no_match_error = rctx.attr.no_match_error)
     canon = canonical(rctx, label)
-    workspace = Label("{}//:REPO.bazel".format(canon))
-    path = rctx.path(workspace)
-
-    if not path.exists:
-        fail("Missing `{}` for `{}`: {}".format(canon, rctx.name, path))
+    path = root(rctx, canon)
+    if not path:
+        fail("Missing `{}` for `{}`".format(canon, rctx.name))
 
     rctx.delete(".")
-    rctx.symlink(path.dirname, ".")
+    rctx.symlink(path, ".")
 
 select = repository_rule(
     doc = DOC,
diff --git a/toolchain/repository/BUILD.bazel b/toolchain/repository/BUILD.bazel
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/toolchain/repository/root.bzl b/toolchain/repository/root.bzl
new file mode 100644
index 0000000000000000000000000000000000000000..b3a0b4adba0e3daeddc92121a637c69ea9c88c6e
--- /dev/null
+++ b/toolchain/repository/root.bzl
@@ -0,0 +1,14 @@
+visibility("//...")
+
+def root(rctx, label):
+    workspace = label.relative("WORKSPACE")
+    path = rctx.path(workspace)
+    if path.exists:
+        return path.dirname
+
+    repo = label.relative("REPO.bazel")
+    path = rctx.path(repo)
+    if path.exists:
+        return path.dirname
+
+    return None