diff --git a/pkgs/by-name/li/libical/fix-cmake.patch b/pkgs/by-name/li/libical/fix-cmake.patch
deleted file mode 100644
index f0e3d002feb7..000000000000
--- a/pkgs/by-name/li/libical/fix-cmake.patch
+++ /dev/null
@@ -1,30 +0,0 @@
-diff --git a/src/test/libical-glib/CMakeLists.txt b/src/test/libical-glib/CMakeLists.txt
-index 01a0894a1..d7d2af5bb 100644
---- a/src/test/libical-glib/CMakeLists.txt
-+++ b/src/test/libical-glib/CMakeLists.txt
-@@ -36,19 +36,19 @@ list(
- 
- if(PYTHON3)
-   set(GI_TYPELIB_PATH_STR "${PROJECT_BINARY_DIR}/src/libical-glib")
--  if(DEFINED GI_TYPELIB_PATH)
--    if($ENV{GI_TYPELIB_PATH})
-+  if(DEFINED ENV{GI_TYPELIB_PATH})
-+    if(NOT ENV{GI_TYPELIB_PATH} STREQUAL "")
-       set(GI_TYPELIB_PATH_STR "${GI_TYPELIB_PATH_STR}:$ENV{GI_TYPELIB_PATH}")
-     endif()
-   endif()
-   set(LIBRARY_PATH_STR "${LIBRARY_OUTPUT_PATH}")
--  if(DEFINED LD_LIBRARY_PATH)
--    if($ENV{LD_LIBRARY_PATH})
-+  if(DEFINED ENV{LD_LIBRARY_PATH})
-+    if(NOT ENV{LD_LIBRARY_PATH} STREQUAL "")
-       set(LIBRARY_PATH_STR "${LIBRARY_PATH_STR}:$ENV{LD_LIBRARY_PATH}")
-     endif()
-   endif()
--  if(DEFINED DYLD_LIBRARY_PATH)
--    if($ENV{DYLD_LIBRARY_PATH})
-+  if(DEFINED ENV{DYLD_LIBRARY_PATH})
-+    if(NOT ENV{DYLD_LIBRARY_PATH} STREQUAL "")
-       set(LIBRARY_PATH_STR "${LIBRARY_PATH_STR}:$ENV{DYLD_LIBRARY_PATH}")
-     endif()
-   endif()
diff --git a/pkgs/by-name/li/libical/package.nix b/pkgs/by-name/li/libical/package.nix
index b3f5a63ab6f1..b774a2207631 100644
--- a/pkgs/by-name/li/libical/package.nix
+++ b/pkgs/by-name/li/libical/package.nix
@@ -20,9 +20,9 @@
   vala,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "libical";
-  version = "3.0.19";
+  version = "3.0.20";
 
   outputs = [
     "out"
@@ -32,8 +32,8 @@ stdenv.mkDerivation rec {
   src = fetchFromGitHub {
     owner = "libical";
     repo = "libical";
-    rev = "v${version}";
-    sha256 = "sha256-ZJXxi1LOZyEpgdcmoK0pe5IA3+l9WY0zLu6Ttzy1QSc=";
+    rev = "v${finalAttrs.version}";
+    sha256 = "sha256-KIMqZ6QAh+fTcKEYrcLlxgip91CLAwL9rwjUdKzBsQk=";
   };
 
   strictDeps = true;
@@ -91,11 +91,6 @@ stdenv.mkDerivation rec {
     # Will appear in 3.1.0
     # https://github.com/libical/libical/issues/350
     ./respect-env-tzdir.patch
-
-    # CMake setup fix for tests
-    # Submitted upstream: https://github.com/libical/libical/pull/885
-    # FIXME: remove when merged
-    ./fix-cmake.patch
   ];
 
   # Using install check so we do not have to manually set GI_TYPELIB_PATH
@@ -129,4 +124,4 @@ stdenv.mkDerivation rec {
     license = licenses.mpl20;
     platforms = platforms.unix;
   };
-}
+})