5 files changed, 5 insertions, 5 deletions
diff --git a/hadrian/src/Rules/Gmp.hs b/hadrian/src/Rules/Gmp.hs
index e4f7e53b48..5666ab3905 100644
--- a/hadrian/src/Rules/Gmp.hs
+++ b/hadrian/src/Rules/Gmp.hs
@@ -14,7 +14,7 @@ gmpObjects = do
     need [gmpPath -/- gmpLibraryH]
     -- The line below causes a Shake Lint failure on Windows, which forced us to
     -- disable Lint by default. See more details here:
-    -- https://ghc.haskell.org/trac/ghc/ticket/15971.
+    -- https://gitlab.haskell.org/ghc/ghc/issues/15971.
     map (unifyPath . (gmpPath -/-)) <$>
         liftIO (getDirectoryFilesIO gmpPath [gmpObjectsDir -/- "*.o"])
 
diff --git a/hadrian/src/Rules/Register.hs b/hadrian/src/Rules/Register.hs
index d215938385..f278cc76f9 100644
--- a/hadrian/src/Rules/Register.hs
+++ b/hadrian/src/Rules/Register.hs
@@ -120,7 +120,7 @@ buildConf _ context@Context {..} conf = do
     -- The above two steps produce an entry in the package database, with copies
     -- of many of the files we have build, e.g. Haskell interface files. We need
     -- to record this side effect so that Shake can cache these files too.
-    -- See why we need 'fixWindows': https://ghc.haskell.org/trac/ghc/ticket/16073
+    -- See why we need 'fixWindows': https://gitlab.haskell.org/ghc/ghc/issues/16073
     let fixWindows path = do
             win <- windowsHost
             version  <- setting GhcVersion
diff --git a/hadrian/src/Rules/Test.hs b/hadrian/src/Rules/Test.hs
index 55ef19a57b..f7e5c45051 100644
--- a/hadrian/src/Rules/Test.hs
+++ b/hadrian/src/Rules/Test.hs
@@ -118,7 +118,7 @@ testRules = do
 
         -- Execute the test target.
         -- We override the verbosity setting to make sure the user can see
-        -- the test output: https://ghc.haskell.org/trac/ghc/ticket/15951.
+        -- the test output: https://gitlab.haskell.org/ghc/ghc/issues/15951.
         withVerbosity Loud $ buildWithCmdOptions env $
             target (vanillaContext Stage2 compiler) RunTest [] []
 
diff --git a/hadrian/src/Settings/Builders/RunTest.hs b/hadrian/src/Settings/Builders/RunTest.hs
index 837e688425..d4e6a244e8 100644
--- a/hadrian/src/Settings/Builders/RunTest.hs
+++ b/hadrian/src/Settings/Builders/RunTest.hs
@@ -44,7 +44,7 @@ runTestGhcFlags = do
         , ifMinGhcVer "711" "-fshow-warning-groups"
         , ifMinGhcVer "801" "-fdiagnostics-color=never"
         , ifMinGhcVer "801" "-fno-diagnostics-show-caret"
-        , pure "-Werror=compat" -- See Trac #15278
+        , pure "-Werror=compat" -- See #15278
         , pure "-dno-debug-output"
         ]
 
diff --git a/hadrian/src/Settings/Flavours/Common.hs b/hadrian/src/Settings/Flavours/Common.hs
index a1eb2fbba9..054633ffe2 100644
--- a/hadrian/src/Settings/Flavours/Common.hs
+++ b/hadrian/src/Settings/Flavours/Common.hs
@@ -2,7 +2,7 @@ module Settings.Flavours.Common where
 
 import Expression
 
--- See https://ghc.haskell.org/trac/ghc/ticket/15286 and
+-- See https://gitlab.haskell.org/ghc/ghc/issues/15286 and
 -- https://phabricator.haskell.org/D4880
 naturalInBaseFixArgs :: Args
 naturalInBaseFixArgs = mconcat