libfetchers: Rename immutable -> locked

This is more consistent with flake terminology.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/libfetchers/github.cc b/src/libfetchers/github.cc
index 2b3705b1b..70622bf79 100644
--- a/src/libfetchers/github.cc
+++ b/src/libfetchers/github.cc
@@ -193,12 +193,12 @@ struct GitArchiveInputScheme : InputScheme
         input.attrs.erase("ref");
         input.attrs.insert_or_assign("rev", rev->gitRev());
 
-        Attrs immutableAttrs({
+        Attrs lockedAttrs({
             {"type", "git-tarball"},
             {"rev", rev->gitRev()},
         });
 
-        if (auto res = getCache()->lookup(store, immutableAttrs)) {
+        if (auto res = getCache()->lookup(store, lockedAttrs)) {
             input.attrs.insert_or_assign("lastModified", getIntAttr(res->first, "lastModified"));
             return {std::move(res->second), input};
         }
@@ -211,7 +211,7 @@ struct GitArchiveInputScheme : InputScheme
 
         getCache()->add(
             store,
-            immutableAttrs,
+            lockedAttrs,
             {
                 {"rev", rev->gitRev()},
                 {"lastModified", uint64_t(lastModified)}