diff --git a/CHANGES.txt b/CHANGES.txt
index 7e7762d..56e6b9f 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -4,7 +4,22 @@ Changes
 4.0.3 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- It turns out a lot of Linux distributions make the links between zoneinfo
+  aliases backwards, so instead of linking GB to Europe/London it actually
+  links the other way. When /etc/localtime then links to Europe/London, and you
+  also have a config file saying Europe/London, the code that checks if
+  /etc/localtime is a symlink ends up at GB instead of Europe/London and
+  we get an error, as it thinks GB and Europe/London are different zones.
+
+  So now we check the symlink of all timezones in the uniqueness test. We still
+  return the name in the config file, though, so you would only get GB or Zulu
+  returned as the time zone instead of Europe/London or UTC if your only
+  configuration is the /etc/localtime symlink, as that's checked last, and
+  tzlocal will return the first configuration found.
+
+- The above change also means that GMT and UTC are no longer seen as synonyms,
+  as zoneinfo does not see them as synonyms. This might be controversial,
+  but you just have to live with it. Pick one and stay with it. ;-)
 
 
 4.0.2 (2021-10-26)
diff --git a/tests/test_data/noconflict/etc/localtime b/tests/test_data/noconflict/etc/localtime
new file mode 120000
index 0000000..4bdf675
--- /dev/null
+++ b/tests/test_data/noconflict/etc/localtime
@@ -0,0 +1 @@
+../usr/share/zoneinfo/Zulu
\ No newline at end of file
diff --git a/tests/test_data/noconflict/etc/timezone b/tests/test_data/noconflict/etc/timezone
index 330a1b1..efdba06 100644
--- a/tests/test_data/noconflict/etc/timezone
+++ b/tests/test_data/noconflict/etc/timezone
@@ -1 +1 @@
-UTC# We allow comments. It's unusual, but has happened
+Etc/UTC# We allow comments. It's unusual, but has happened
diff --git a/tests/test_data/noconflict/usr/share/zoneinfo/Etc/UCT b/tests/test_data/noconflict/usr/share/zoneinfo/Etc/UCT
new file mode 120000
index 0000000..1ed0820
--- /dev/null
+++ b/tests/test_data/noconflict/usr/share/zoneinfo/Etc/UCT
@@ -0,0 +1 @@
+UTC
\ No newline at end of file
diff --git a/tests/test_data/noconflict/usr/share/zoneinfo/Etc/UTC b/tests/test_data/noconflict/usr/share/zoneinfo/Etc/UTC
new file mode 100644
index 0000000..5583f5b
Binary files /dev/null and b/tests/test_data/noconflict/usr/share/zoneinfo/Etc/UTC differ
diff --git a/tests/test_data/noconflict/usr/share/zoneinfo/UTC b/tests/test_data/noconflict/usr/share/zoneinfo/UTC
new file mode 120000
index 0000000..e8fc73f
--- /dev/null
+++ b/tests/test_data/noconflict/usr/share/zoneinfo/UTC
@@ -0,0 +1 @@
+Etc/UCT
\ No newline at end of file
diff --git a/tests/test_data/noconflict/usr/share/zoneinfo/Zulu b/tests/test_data/noconflict/usr/share/zoneinfo/Zulu
new file mode 120000
index 0000000..1ed0820
--- /dev/null
+++ b/tests/test_data/noconflict/usr/share/zoneinfo/Zulu
@@ -0,0 +1 @@
+UTC
\ No newline at end of file
diff --git a/tests/test_tzlocal.py b/tests/test_tzlocal.py
index caad37e..fbd471e 100644
--- a/tests/test_tzlocal.py
+++ b/tests/test_tzlocal.py
@@ -271,9 +271,12 @@ def test_conflicting():
     assert "localtime is a symlink to: Africa/Harare" in message
 
 
+@pytest.mark.skipif(
+    platform.system() == "Windows", reason="Symbolic links are not available on Windows"
+)
 def test_noconflict():
     tz = tzlocal.unix._get_localzone(_root=tz_path("noconflict"))
-    assert str(tz) == "UTC"
+    assert str(tz) == "Etc/UTC"
 
 
 def test_pytz_compatibility():
diff --git a/tzlocal/unix.py b/tzlocal/unix.py
index 4c170d6..eaf96d9 100644
--- a/tzlocal/unix.py
+++ b/tzlocal/unix.py
@@ -126,18 +126,15 @@ def _get_localzone_name(_root="/"):
         if len(found_configs) > 1:
             # Uh-oh, multiple configs. See if they match:
             unique_tzs = set()
+            zoneinfo = os.path.join(_root, "usr", "share", "zoneinfo")
+            directory_depth = len(zoneinfo.split(os.path.sep))
+
             for tzname in found_configs.values():
-                # Get rid of any Etc's
-                tzname = tzname.replace("Etc/", "")
-                # Let's handle these synonyms as well. Many systems have tons
-                # of synonyms, including country names and other non-zoneinfo
-                # nonsense. Those will be seen as different ones. Let's stick
-                # to the official zoneinfo Continent/City names.
-                if tzname in ["GMT0", "GMT+0", "GMT-0"]:
-                    tzname = "GMT"
-                if tzname in ["UCT", "Zulu"]:
-                    tzname = "UTC"
-                unique_tzs.add(tzname)
+                # Look them up in /usr/share/zoneinfo, and find what they
+                # really point to:
+                path = os.path.realpath(os.path.join(zoneinfo, *tzname.split("/")))
+                real_zone_name = "/".join(path.split(os.path.sep)[directory_depth:])
+                unique_tzs.add(real_zone_name)
 
             if len(unique_tzs) != 1:
                 message = "Multiple conflicting time zone configurations found:\n"