diff --git a/srcpkgs/clementine/patches/gcc11.patch b/srcpkgs/clementine/patches/gcc11.patch
new file mode 100644
index 00000000000..e8523c7f5a0
--- /dev/null
+++ b/srcpkgs/clementine/patches/gcc11.patch
@@ -0,0 +1,70 @@
+From cfcd0a956e6758624fab0ff20aee9eb08b3df0b3 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Robert-Andr=C3=A9=20Mauchin?= <zebob.m@gmail.com>
+Date: Wed, 16 Dec 2020 20:03:26 +0100
+Subject: [PATCH] Drop -std=c++0x and -U__STRICT_ANSI__
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This was causing compilation failures, static assertion failed, with GCC 11.
+
+Fix #6865
+
+Signed-off-by: Robert-André Mauchin <zebob.m@gmail.com>
+---
+ ext/clementine-spotifyblob/CMakeLists.txt | 2 +-
+ ext/clementine-tagreader/CMakeLists.txt   | 2 +-
+ src/CMakeLists.txt                        | 2 +-
+ tests/CMakeLists.txt                      | 2 +-
+ 4 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/ext/clementine-spotifyblob/CMakeLists.txt b/ext/clementine-spotifyblob/CMakeLists.txt
+index e5342ee5b3..6fd551d572 100644
+--- a/ext/clementine-spotifyblob/CMakeLists.txt
++++ b/ext/clementine-spotifyblob/CMakeLists.txt
+@@ -7,7 +7,7 @@ include_directories(${CMAKE_SOURCE_DIR}/ext/libclementine-spotifyblob)
+ include_directories(${CMAKE_SOURCE_DIR}/ext/libclementine-common)
+ include_directories(${CMAKE_SOURCE_DIR}/src)
+ 
+-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Woverloaded-virtual -Wall -Wno-sign-compare -Wno-deprecated-declarations -Wno-unused-local-typedefs -Wno-unused-private-field -Wno-unknown-warning-option --std=c++0x -U__STRICT_ANSI__")
++set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Woverloaded-virtual -Wall -Wno-sign-compare -Wno-deprecated-declarations -Wno-unused-local-typedefs -Wno-unused-private-field -Wno-unknown-warning-option")
+ 
+ link_directories(${SPOTIFY_LIBRARY_DIRS})
+ 
+diff --git a/ext/clementine-tagreader/CMakeLists.txt b/ext/clementine-tagreader/CMakeLists.txt
+index 855e390cfe..a48b014504 100644
+--- a/ext/clementine-tagreader/CMakeLists.txt
++++ b/ext/clementine-tagreader/CMakeLists.txt
+@@ -7,7 +7,7 @@ include_directories(${CMAKE_BINARY_DIR}/ext/libclementine-tagreader)
+ include_directories(${CMAKE_SOURCE_DIR}/src)
+ include_directories(${CMAKE_BINARY_DIR}/src)
+ 
+-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++0x -U__STRICT_ANSI__")
++set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+ 
+ set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR})
+ 
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index 627b2e7cb9..0bbc775ba8 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -1,6 +1,6 @@
+ 
+ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
+-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Woverloaded-virtual -Wall -Wno-sign-compare -Wno-deprecated-declarations -Wno-unused-local-typedefs -Wno-unused-private-field -Wno-unknown-warning-option --std=c++0x -U__STRICT_ANSI__")
++set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Woverloaded-virtual -Wall -Wno-sign-compare -Wno-deprecated-declarations -Wno-unused-local-typedefs -Wno-unused-private-field -Wno-unknown-warning-option")
+ 
+ option(BUILD_WERROR "Build with -Werror" ON)
+ 
+diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
+index 4474e7be51..ff571fc199 100644
+--- a/tests/CMakeLists.txt
++++ b/tests/CMakeLists.txt
+@@ -1,6 +1,6 @@
+ cmake_minimum_required(VERSION 2.8.11)
+ 
+-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x -fpermissive -Wno-c++11-narrowing -U__STRICT_ANSI__")
++set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fpermissive -Wno-c++11-narrowing")
+ 
+ if(USE_SYSTEM_GMOCK)
+   include_directories(${GMOCK_INCLUDE_DIRS} ${GTEST_INCLUDE_DIRS})