diff --git a/build-aux/m4/ax_cxx_compile_stdcxx.m4 b/build-aux/m4/ax_cxx_compile_stdcxx.m4
index 94de9e8a146f86..a4266d95369dec 100644
--- a/build-aux/m4/ax_cxx_compile_stdcxx.m4
+++ b/build-aux/m4/ax_cxx_compile_stdcxx.m4
@@ -986,7 +986,7 @@ m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_20], [[
 
 #error "This is not a C++ compiler"
 
-#elif __cplusplus < 202002L
+#elif __cplusplus < 201709L  // Temporary patch on top of upstream to allow g++-10
 
 #error "This is not a C++20 compiler"
 
diff --git a/configure.ac b/configure.ac
index 4dae9c74525e02..f8e78bea654a69 100644
--- a/configure.ac
+++ b/configure.ac
@@ -66,18 +66,8 @@ case $host in
   ;;
 esac
 
-AC_ARG_ENABLE([c++20],
-  [AS_HELP_STRING([--enable-c++20],
-  [enable compilation in c++20 mode (disabled by default)])],
-  [use_cxx20=$enableval],
-  [use_cxx20=no])
-
-dnl Require C++17 or C++20 compiler (no GNU extensions)
-if test "x$use_cxx20" = xyes; then
-  AX_CXX_COMPILE_STDCXX([20], [noext], [mandatory])
-else
-  AX_CXX_COMPILE_STDCXX([17], [noext], [mandatory])
-fi
+dnl Require C++20 compiler (no GNU extensions)
+AX_CXX_COMPILE_STDCXX([20], [noext], [mandatory])
 
 dnl Check if -latomic is required for <std::atomic>
 CHECK_ATOMIC
diff --git a/depends/Makefile b/depends/Makefile
index 823be933a7b254..db63acfe0f42dd 100644
--- a/depends/Makefile
+++ b/depends/Makefile
@@ -43,6 +43,9 @@ NO_NATPMP ?=
 MULTIPROCESS ?=
 FALLBACK_DOWNLOAD_PATH ?= https://bitcoincore.org/depends-sources
 
+C_STANDARD ?= c11
+CXX_STANDARD ?= c++20
+
 BUILD = $(shell ./config.guess)
 HOST ?= $(BUILD)
 PATCHES_PATH = $(BASEDIR)/patches
diff --git a/depends/README.md b/depends/README.md
index ab6a01b8c03ece..2bd44a33b0e94d 100644
--- a/depends/README.md
+++ b/depends/README.md
@@ -99,6 +99,8 @@ The following can be set when running make: `make FOO=bar`
 - `BASE_CACHE`: Built packages will be placed here
 - `SDK_PATH`: Path where SDKs can be found (used by macOS)
 - `FALLBACK_DOWNLOAD_PATH`: If a source file can't be fetched, try here before giving up
+- `C_STANDARD`: Set the C standard version used. Defaults to `c11`.
+- `CXX_STANDARD`: Set the C++ standard version used. Defaults to `c++20`.
 - `NO_QT`: Don't download/build/cache Qt and its dependencies
 - `NO_QR`: Don't download/build/cache packages needed for enabling qrencode
 - `NO_ZMQ`: Don't download/build/cache packages needed for enabling ZeroMQ
diff --git a/depends/packages/qt.mk b/depends/packages/qt.mk
index 6dbae734b5dfda..da0e1a819edc83 100644
--- a/depends/packages/qt.mk
+++ b/depends/packages/qt.mk
@@ -39,7 +39,7 @@ $(package)_config_opts_release += -silent
 $(package)_config_opts_debug = -debug
 $(package)_config_opts_debug += -optimized-tools
 $(package)_config_opts += -bindir $(build_prefix)/bin
-$(package)_config_opts += -c++std c++17
+$(package)_config_opts += -c++std c++2a
 $(package)_config_opts += -confirm-license
 $(package)_config_opts += -hostprefix $(build_prefix)
 $(package)_config_opts += -no-compile-examples