diff --git a/Cabal-syntax/src/Distribution/PackageDescription/PrettyPrint.hs b/Cabal-syntax/src/Distribution/PackageDescription/PrettyPrint.hs
index b03b1b99ada..8303a65e7d5 100644
--- a/Cabal-syntax/src/Distribution/PackageDescription/PrettyPrint.hs
+++ b/Cabal-syntax/src/Distribution/PackageDescription/PrettyPrint.hs
@@ -271,7 +271,7 @@ preProcessInternalDeps specVer gpd
 
     transformD :: Dependency -> [Dependency]
     transformD (Dependency pn vr ln)
-      | pn == thisPn =
+      | pn == thisPn && specVer < CabalSpecV3_0 =
           if LMainLibName `NES.member` ln
             then Dependency thisPn vr mainLibSet : sublibs
             else sublibs
@@ -282,9 +282,12 @@ preProcessInternalDeps specVer gpd
           ]
     transformD d = [d]
 
+    -- Always perform transformation for mixins as syntax was only introduced in 3.4
+    -- This guard is uncessary as no transformations take place when cabalSpec < CabalSpecV3_4 but
+    -- it more clearly signifies the intent.
     transformM :: Mixin -> Mixin
     transformM (Mixin pn (LSubLibName uqn) inc)
-      | pn == thisPn =
+      | pn == thisPn && specVer < CabalSpecV3_4 =
           mkMixin (unqualComponentNameToPackageName uqn) LMainLibName inc
     transformM m = m
 
diff --git a/validate.sh b/validate.sh
index ff1c9e139a9..4fd67ffff55 100755
--- a/validate.sh
+++ b/validate.sh
@@ -419,7 +419,7 @@ CMD="$($CABALLISTBIN Cabal-tests:test:no-thunks-test) $TESTSUITEJOBS --hide-succ
 
 
 # See #10284 for why this value is pinned.
-HACKAGE_TESTS_INDEX_STATE="--index-state=2024-08-25"
+HACKAGE_TESTS_INDEX_STATE="--index-state=2024-08-28"
 
 CMD=$($CABALLISTBIN Cabal-tests:test:hackage-tests)
 (cd Cabal-tests && timed $CMD read-fields $HACKAGE_TESTS_INDEX_STATE) || exit 1