diff --git a/cabal-install/src/Distribution/Client/ProjectConfig/FieldGrammar.hs b/cabal-install/src/Distribution/Client/ProjectConfig/FieldGrammar.hs
index ac371aee2f5..9ba089bca17 100644
--- a/cabal-install/src/Distribution/Client/ProjectConfig/FieldGrammar.hs
+++ b/cabal-install/src/Distribution/Client/ProjectConfig/FieldGrammar.hs
@@ -11,7 +11,6 @@ module Distribution.Client.ProjectConfig.FieldGrammar
 import Data.Bool (bool)
 import qualified Data.ByteString.Char8 as BS
 import qualified Data.Set as Set
-import Distribution.CabalSpecVersion (CabalSpecVersion (..))
 import Distribution.Client.CmdInstall.ClientInstallFlags (clientInstallFlagsGrammar)
 import qualified Distribution.Client.ProjectConfig.Lens as L
 import Distribution.Client.ProjectConfig.Types (PackageConfig (..), ProjectConfig (..), ProjectConfigBuildOnly (..), ProjectConfigProvenance (..), ProjectConfigShared (..))
@@ -199,11 +198,9 @@ packageConfigCoverageGrammar =
   (<>)
     <$> optionalFieldDef "coverage" L.packageConfigCoverage mempty
     <*> optionalFieldDef "library-coverage" L.packageConfigCoverage mempty
-      ^^^ deprecatedSince CabalSpecV1_22 "Please use 'coverage' field instead."
 
 packageConfigPreferVersion :: ParsecFieldGrammar ProjectConfigShared (Flag PreferVersion)
 packageConfigPreferVersion =
   mappend . fmap (bool PreferInstalledOrLatest PreferOldest)
     <$> optionalFieldDef "prefer-oldest" L.projectConfigPreferOldest mempty
-      ^^^ deprecatedSince CabalSpecV3_20 "Please use 'prefer-version' field instead."
     <*> optionalFieldDef "prefer-version" L.projectConfigPreferVersion mempty
diff --git a/cabal-testsuite/PackageTests/Regression/T5213/cabal.out b/cabal-testsuite/PackageTests/Regression/T5213/cabal.out
index bcbb8421e34..fb0e7ad7a9a 100644
--- a/cabal-testsuite/PackageTests/Regression/T5213/cabal.out
+++ b/cabal-testsuite/PackageTests/Regression/T5213/cabal.out
@@ -1,6 +1,4 @@
 # cabal new-test
-Warnings found while parsing the project file, cabal.project:
- - cabal.project:4:3: The field "library-coverage" is deprecated in the Cabal specification version 1.22. Please use 'coverage' field instead.
 Resolving dependencies...
 Build profile: -w ghc-<GHCVER> -O1
 In order, the following will be built:
diff --git a/changelog.d/12357.md b/changelog.d/12357.md
new file mode 100644
index 00000000000..9c4c4e3b06e
--- /dev/null
+++ b/changelog.d/12357.md
@@ -0,0 +1,12 @@
+---
+synopsis: Drop deprecation warnings for library-coverage and prefer-version flags
+packages: [cabal-install]
+prs: 12080
+issues: 12357
+---
+
+The `library-coverage` and `prefer-version` flags of `cabal-install` were marked as deprecated with
+reference to versions of the unrelated `.cabal` format spec, which is confusing, so we have dropped these
+messages.
+These flags are deprecated and we will likely re-introduce deprecation messages
+when we have a better way to communicate that.