diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 5e32c922264..0d906e7bf31 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1736,4 +1736,11 @@ self: super: {
   # 2021-04-02: Outdated optparse-applicative bound is fixed but not realeased on upstream.
   extensions = assert super.extensions.version == "0.0.0.1"; doJailbreak super.extensions;
 
+  # 2021-04-02: iCalendar is basically unmaintained.
+  # There are PRs for bumping the bounds: https://github.com/chrra/iCalendar/pull/46
+  iCalendar = overrideCabal (doJailbreak super.iCalendar) {
+      # Overriding bounds behind a cabal flag
+      preConfigure = ''substituteInPlace iCalendar.cabal --replace "network >=2.6 && <2.7" "network -any"'';
+  };
+
 } // import ./configuration-tensorflow.nix {inherit pkgs haskellLib;} self super
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix.yaml
index 96feb17fce9..43fe0974986 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix.yaml
@@ -2849,6 +2849,7 @@ package-maintainers:
     - taskwarrior
     - haskell-language-server
     - shake-bench
+    - iCalendar
   sorki:
     - cayene-lpp
     - data-stm32
@@ -7025,7 +7026,6 @@ broken-packages:
   - ib-api
   - iban
   - ical
-  - iCalendar
   - ice40-prim
   - IcoGrid
   - iconv-typed
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 4c09c4619d9..c532b527aa7 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -145711,8 +145711,7 @@ self: {
        ];
        description = "iCalendar data types, parser, and printer";
        license = lib.licenses.bsd3;
-       hydraPlatforms = lib.platforms.none;
-       broken = true;
+       maintainers = with lib.maintainers; [ maralorn ];
      }) {};
 
   "iException" = callPackage