diff --git a/base/loading.jl b/base/loading.jl
index e0a2563dd01781..ffbaa5a81630d7 100644
--- a/base/loading.jl
+++ b/base/loading.jl
@@ -1242,9 +1242,9 @@ function _include_from_serialized(pkg::PkgId, path::String, ocachepath::Union{No
                 elapsed = round((time_ns() - t_before) / 1e6, digits = 1)
                 comp_time, recomp_time = cumulative_compile_time_ns() .- t_comp_before
                 print(lpad(elapsed, 9), " ms  ")
-                parentid = get(EXT_PRIMED, pkg, nothing)
-                if parentid !== nothing
-                    print(parentid.name, " → ")
+                ext_parent = extension_parent(M)
+                if ext_parent !== nothing
+                    print(ext_parent::String, " → ")
                 end
                 print(pkg.name)
                 if comp_time > 0
@@ -1266,6 +1266,25 @@ function _include_from_serialized(pkg::PkgId, path::String, ocachepath::Union{No
     end
 end
 
+function extension_parent(M::Module)
+    @show _pkgdir = pkgdir(M)
+    _pkgdir === nothing && return nothing
+    pkgdir_parts = splitpath(_pkgdir)
+    ext_pos = findlast(==("ext"), pkgdir_parts)
+    if ext_pos !== nothing && ext_pos >= length(pkgdir_parts) - 1
+        @show parent_package_root = joinpath(pkgdir_parts[1:ext_pos-1]...)
+        @show parent_package_project_file = locate_project_file(parent_package_root)
+        if parent_package_project_file isa String
+            d = parsed_toml(parent_package_project_file)
+            name = get(d, "name", nothing)
+            if name !== nothing
+                return name
+            end
+        end
+    end
+    return nothing
+end
+
 function register_restored_modules(sv::SimpleVector, pkg::PkgId, path::String)
     # This function is also used by PkgCacheInspector.jl
     restored = sv[1]::Vector{Any}
@@ -1447,7 +1466,7 @@ function _insert_extension_triggers(parent::PkgId, extensions::Dict{String, Any}
         triggers = triggers::Union{String, Vector{String}}
         triggers isa String && (triggers = [triggers])
         id = PkgId(uuid5(parent.uuid::UUID, ext), ext)
-        if id in keys(EXT_PRIMED) || haskey(Base.loaded_modules, id)
+        if haskey(EXT_PRIMED, id) || haskey(Base.loaded_modules, id)
             continue  # extension is already primed or loaded, don't add it again
         end
         EXT_PRIMED[id] = parent