Revert "Use upstream functionality for fixing stdlib paths (#136)"

This reverts commit 4a51dbf.

Author: KristofferC

src/utils.jl

@@ -359,7 +359,28 @@ function maybe_fix_path(file)
             file = normpath(newfile)
         end
     end
-    return Base.fixup_stdlib_path(file)
+    return maybe_fixup_stdlib_path(file)
+end
+
+safe_isfile(x) = try isfile(x); catch; false end
+const BUILDBOT_STDLIB_PATH = dirname(abspath(String((@which uuid1()).file), "..", "..", ".."))
+replace_buildbot_stdlibpath(str::String) = replace(str, BUILDBOT_STDLIB_PATH => Sys.STDLIB)
+"""
+    path = maybe_fixup_stdlib_path(path::String)
+
+Return `path` corrected for julia issue [#26314](https://github.com/JuliaLang/julia/issues/26314) if applicable.
+Otherwise, return the input `path` unchanged.
+
+Due to the issue mentioned above, location info for methods defined one of Julia's standard libraries
+are, for non source Julia builds, given as absolute paths on the worker that built the `julia` executable.
+This function corrects such a path to instead refer to the local path on the users drive.
+"""
+function maybe_fixup_stdlib_path(path)
+    if !safe_isfile(path)
+        maybe_stdlib_path = replace_buildbot_stdlibpath(path)
+        safe_isfile(maybe_stdlib_path) && return maybe_stdlib_path
+    end
+    return path
 end
 
 function postpath(filename, pre)