diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index bb4cc3cffa2..2de430b228d 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -81,7 +81,8 @@ default-package-overrides:
   # e. g. https://github.com/diagrams/diagrams-core/issues/115
   # We can keep this pin presumably until base 4.15
   - monoid-extras < 0.6
-  - ghcide == 1.2.*                     # 2021-05-11: Pin ghcide for hls 1.1.0
+  - ghcide == 1.2.*                     # 2021-05-11: Pin for hls 1.1.0
+  - hls-plugin-api == 1.1.0.0           # 2021-05-11: Pin for hls 1.1.0
 
 extra-packages:
   - base16-bytestring < 1               # required for cabal-install etc.
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 27a26e1aa2e..6adb2d2624f 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -129855,6 +129855,25 @@ self: {
      }) {};
 
   "hls-plugin-api" = callPackage
+    ({ mkDerivation, aeson, base, containers, data-default
+     , dependent-map, dependent-sum, Diff, dlist, hashable, hslogger
+     , lens, lsp, opentelemetry, process, regex-tdfa, shake, text, unix
+     , unordered-containers
+     }:
+     mkDerivation {
+       pname = "hls-plugin-api";
+       version = "1.1.0.0";
+       sha256 = "1i18a5gxa409882zpviy4paldaq43j4z1zmgr9mag2mn64vplrxy";
+       libraryHaskellDepends = [
+         aeson base containers data-default dependent-map dependent-sum Diff
+         dlist hashable hslogger lens lsp opentelemetry process regex-tdfa
+         shake text unix unordered-containers
+       ];
+       description = "Haskell Language Server API for plugin communication";
+       license = lib.licenses.asl20;
+     }) {};
+
+  "hls-plugin-api_1_1_0_1" = callPackage
     ({ mkDerivation, aeson, base, containers, data-default
      , dependent-map, dependent-sum, Diff, dlist, hashable, hls-graph
      , hslogger, lens, lsp, opentelemetry, process, regex-tdfa, text
@@ -129871,6 +129890,7 @@ self: {
        ];
        description = "Haskell Language Server API for plugin communication";
        license = lib.licenses.asl20;
+       hydraPlatforms = lib.platforms.none;
      }) {};
 
   "hls-retrie-plugin" = callPackage