diff --git a/doc/manual/generate-manpage.nix b/doc/manual/generate-manpage.nix
index 791bfd2c7..327b5260c 100644
--- a/doc/manual/generate-manpage.nix
+++ b/doc/manual/generate-manpage.nix
@@ -36,11 +36,6 @@ let
     let
 
       result = ''
-        > **Warning** \
-        > This program is
-        > [**experimental**](@docroot@/development/experimental-features.md#xp-feature-nix-command)
-        > and its interface is subject to change.
-
         # Name
 
         `${command}` - ${details.description}
diff --git a/doc/manual/local.mk b/doc/manual/local.mk
index fcc50f460..76d09654c 100644
--- a/doc/manual/local.mk
+++ b/doc/manual/local.mk
@@ -35,7 +35,7 @@ dummy-env = env -i \
 	NIX_STATE_DIR=/dummy \
 	NIX_CONFIG='cores = 0'
 
-nix-eval = $(dummy-env) $(doc_nix) eval --experimental-features nix-command -I nix=doc/manual --store dummy:// --impure --raw
+nix-eval = $(dummy-env) $(doc_nix) eval -I nix=doc/manual --store dummy:// --impure --raw
 
 # re-implement mdBook's include directive to make it usable for terminal output and for proper @docroot@ substitution
 define process-includes
@@ -121,7 +121,7 @@ $(d)/nix.json: $(doc_nix)
 	@mv $@.tmp $@
 
 $(d)/conf-file.json: $(doc_nix)
-	$(trace-gen) $(dummy-env) $(doc_nix) config show --json --experimental-features nix-command > $@.tmp
+	$(trace-gen) $(dummy-env) $(doc_nix) config show --json > $@.tmp
 	@mv $@.tmp $@
 
 $(d)/src/development/experimental-feature-descriptions.md: $(d)/xp-features.json $(d)/utils.nix $(d)/generate-xp-features.nix $(doc_nix)
diff --git a/doc/manual/src/development/building.md b/doc/manual/src/development/building.md
index 1579b7e3b..8b7046377 100644
--- a/doc/manual/src/development/building.md
+++ b/doc/manual/src/development/building.md
@@ -1,66 +1,4 @@
-# Building Nix
-
-This section provides some notes on how to start hacking on Nix.
-To get the latest version of Nix from GitHub:
-
-```console
-$ git clone https://github.com/NixOS/nix.git
-$ cd nix
-```
-
-> **Note**
->
-> The following instructions assume you already have some version of Nix installed locally, so that you can use it to set up the development environment.
-> If you don't have it installed, follow the [installation instructions](../installation/index.md).
-
-
-To build all dependencies and start a shell in which all environment variables are set up so that those dependencies can be found:
-
-```console
-$ nix-shell
-```
-
-To get a shell with one of the other [supported compilation environments](#compilation-environments):
-
-```console
-$ nix-shell --attr devShells.x86_64-linux.native-clangStdenvPackages
-```
-
-> **Note**
->
-> You can use `native-ccacheStdenvPackages` to drastically improve rebuild time.
-> By default, [ccache](https://ccache.dev) keeps artifacts in `~/.cache/ccache/`.
-
-To build Nix itself in this shell:
-
-```console
-[nix-shell]$ autoreconfPhase
-[nix-shell]$ ./configure $configureFlags --prefix=$(pwd)/outputs/out
-[nix-shell]$ make -j $NIX_BUILD_CORES
-```
-
-To install it in `$(pwd)/outputs` and test it:
-
-```console
-[nix-shell]$ make install
-[nix-shell]$ make installcheck -j $NIX_BUILD_CORES
-[nix-shell]$ ./outputs/out/bin/nix --version
-nix (Nix) 2.12
-```
-
-To build a release version of Nix for the current operating system and CPU architecture:
-
-```console
-$ nix-build
-```
-
-You can also build Nix for one of the [supported platforms](#platforms).
-
-## Building Nix with flakes
-
-This section assumes you are using Nix with the [`nix-command`] experimental feature enabled.
-
-[`nix-command`]: @docroot@/development/experimental-features.md#xp-nix-command
+## Building Nix
 
 To build all dependencies and start a shell in which all environment variables are set up so that those dependencies can be found:
 
@@ -154,12 +92,6 @@ platform. Common solutions include [remote build machines] and [binary format em
 Given such a setup, executing the build only requires selecting the respective attribute.
 For example, to compile for `aarch64-linux`:
 
-```console
-$ nix-build --attr packages.aarch64-linux.default
-```
-
-or for Nix with the [`flakes`] and [`nix-command`] experimental features enabled:
-
 ```console
 $ nix build .#packages.aarch64-linux.default
 ```
@@ -241,20 +173,12 @@ To build with one of those environments, you can use
 $ nix build .#nix-ccacheStdenv
 ```
 
-for flake-enabled Nix, or
-
-```console
-$ nix-build --attr nix-ccacheStdenv
-```
-
-for classic Nix.
-
 You can use any of the other supported environments in place of `nix-ccacheStdenv`.
 
 ## Editor integration
 
 The `clangd` LSP server is installed by default on the `clang`-based `devShell`s.
-See [supported compilation environments](#compilation-environments) and instructions how to set up a shell [with flakes](#nix-with-flakes) or in [classic Nix](#classic-nix).
+See [supported compilation environments](#compilation-environments) and instructions how to [set up a shell with flakes](#nix-with-flakes).
 
 To use the LSP with your editor, you first need to [set up `clangd`](https://clangd.llvm.org/installation#project-setup) by running:
 
diff --git a/doc/manual/src/protocols/json/derivation.md b/doc/manual/src/protocols/json/derivation.md
index 2f85340d6..6af7c0dfb 100644
--- a/doc/manual/src/protocols/json/derivation.md
+++ b/doc/manual/src/protocols/json/derivation.md
@@ -1,11 +1,5 @@
 # Derivation JSON Format
 
-> **Warning**
->
-> This JSON format is currently
-> [**experimental**](@docroot@/development/experimental-features.md#xp-feature-nix-command)
-> and subject to change.
-
 The JSON serialization of a
 [derivations](@docroot@/glossary.md#gloss-store-derivation)
 is a JSON object with the following fields:
diff --git a/doc/manual/src/protocols/json/store-object-info.md b/doc/manual/src/protocols/json/store-object-info.md
index 6b4f48437..fee415eef 100644
--- a/doc/manual/src/protocols/json/store-object-info.md
+++ b/doc/manual/src/protocols/json/store-object-info.md
@@ -1,11 +1,5 @@
 # Store object info JSON format
 
-> **Warning**
->
-> This JSON format is currently
-> [**experimental**](@docroot@/development/experimental-features.md#xp-feature-nix-command)
-> and subject to change.
-
 Info about a [store object].
 
 * `path`:
diff --git a/scripts/installer.nix b/scripts/installer.nix
index cc7759c2c..3d51d4916 100644
--- a/scripts/installer.nix
+++ b/scripts/installer.nix
@@ -25,7 +25,7 @@ runCommand "installer-script" {
       (tarball: let
           inherit (tarball.stdenv.hostPlatform) system;
         in '' \
-        --replace '@tarballHash_${system}@' $(nix --experimental-features nix-command hash-file --base16 --type sha256 ${tarball}/*.tar.xz) \
+        --replace '@tarballHash_${system}@' $(nix hash-file --base16 --type sha256 ${tarball}/*.tar.xz) \
         --replace '@tarballPath_${system}@' $(tarballPath ${tarball}/*.tar.xz) \
         ''
       )
diff --git a/src/libstore/build/derivation-goal.cc b/src/libstore/build/derivation-goal.cc
index b809e3ffe..a1f88b79e 100644
--- a/src/libstore/build/derivation-goal.cc
+++ b/src/libstore/build/derivation-goal.cc
@@ -988,9 +988,7 @@ Goal::Co DerivationGoal::buildDone()
                     msg += line;
                     msg += "\n";
                 }
-                auto nixLogCommand = experimentalFeatureSettings.isEnabled(Xp::NixCommand)
-                    ? "nix log"
-                    : "nix-store -l";
+                auto nixLogCommand = "nix log";
                 msg += fmt("For full logs, run '" ANSI_BOLD "%s %s" ANSI_NORMAL "'.",
                     nixLogCommand,
                     worker.store.printStorePath(drvPath));
diff --git a/src/libutil/args.cc b/src/libutil/args.cc
index d58f4b4ae..113e665b2 100644
--- a/src/libutil/args.cc
+++ b/src/libutil/args.cc
@@ -582,7 +582,7 @@ Strings argvToStrings(int argc, char * * argv)
 
 std::optional<ExperimentalFeature> Command::experimentalFeature ()
 {
-    return { Xp::NixCommand };
+    return {};
 }
 
 MultiCommand::MultiCommand(std::string_view commandName, const Commands & commands_)
diff --git a/src/libutil/config.hh b/src/libutil/config.hh
index a371e636c..bcca030ac 100644
--- a/src/libutil/config.hh
+++ b/src/libutil/config.hh
@@ -386,7 +386,7 @@ struct ExperimentalFeatureSettings : Config {
           Example:
 
           ```
-          experimental-features = nix-command
+          experimental-features = ca-derivations
           ```
 
           The following experimental features are available:
diff --git a/src/libutil/experimental-features.cc b/src/libutil/experimental-features.cc
index 7d51f241f..df70adaa6 100644
--- a/src/libutil/experimental-features.cc
+++ b/src/libutil/experimental-features.cc
@@ -86,15 +86,6 @@ constexpr std::array<ExperimentalFeatureDetails, numXpFeatures> xpFeatureDetails
         )",
         .trackingUrl = "https://github.com/NixOS/nix/milestone/31",
     },
-    {
-        .tag = Xp::NixCommand,
-        .name = "nix-command",
-        .description = R"(
-            Enable the new `nix` subcommands. See the manual on
-            [`nix`](@docroot@/command-ref/new-cli/nix.md) for details.
-        )",
-        .trackingUrl = "https://github.com/NixOS/nix/milestone/28",
-    },
     {
         .tag = Xp::GitHashing,
         .name = "git-hashing",
@@ -310,7 +301,7 @@ static_assert(
  * A set of previously experimental features that are now considered
  * stable. We don't warn if users have these in `experimental-features`.
  */
-std::set<std::string> stabilizedFeatures{"flakes"};
+std::set<std::string> stabilizedFeatures{"flakes", "nix-command"};
 
 const std::optional<ExperimentalFeature> parseExperimentalFeature(const std::string_view & name)
 {
diff --git a/src/libutil/experimental-features.hh b/src/libutil/experimental-features.hh
index e7c651cbd..6dda2d6f3 100644
--- a/src/libutil/experimental-features.hh
+++ b/src/libutil/experimental-features.hh
@@ -19,7 +19,6 @@ enum struct ExperimentalFeature
     CaDerivations,
     ImpureDerivations,
     FetchTree,
-    NixCommand,
     GitHashing,
     RecursiveNix,
     NoUrlLiterals,
diff --git a/src/nix/main.cc b/src/nix/main.cc
index e777712d1..1c5209cec 100644
--- a/src/nix/main.cc
+++ b/src/nix/main.cc
@@ -122,7 +122,6 @@ struct NixArgs : virtual MultiCommand, virtual MixCommonArgs, virtual RootArgs
             .description = "Print full build logs on standard error.",
             .category = loggingCategory,
             .handler = {[&]() { logger->setPrintBuildLogs(true); }},
-            .experimentalFeature = Xp::NixCommand,
         });
 
         addFlag({
@@ -138,7 +137,6 @@ struct NixArgs : virtual MultiCommand, virtual MixCommonArgs, virtual RootArgs
             .description = "Disable substituters and consider all previously downloaded files up-to-date.",
             .category = miscCategory,
             .handler = {[&]() { useNet = false; }},
-            .experimentalFeature = Xp::NixCommand,
         });
 
         addFlag({
@@ -146,7 +144,6 @@ struct NixArgs : virtual MultiCommand, virtual MixCommonArgs, virtual RootArgs
             .description = "Consider all previously downloaded files out-of-date.",
             .category = miscCategory,
             .handler = {[&]() { refresh = true; }},
-            .experimentalFeature = Xp::NixCommand,
         });
     }
 
diff --git a/src/nix/nix.md b/src/nix/nix.md
index c4632fafb..d37cb9cce 100644
--- a/src/nix/nix.md
+++ b/src/nix/nix.md
@@ -48,11 +48,6 @@ manual](https://nixos.org/manual/nix/stable/).
 
 # Installables
 
-> **Warning** \
-> Installables are part of the unstable
-> [`nix-command` experimental feature](@docroot@/development/experimental-features.md#xp-feature-nix-command),
-> and subject to change without notice.
-
 Many `nix` subcommands operate on one or more *installables*.
 These are command line arguments that represent something that can be realised in the Nix store.
 
@@ -72,11 +67,6 @@ That is, Nix will operate on the default flake output attribute of the flake in
 
 ### Flake output attribute
 
-> **Warning** \
-> Flake output attribute installables depend on the
-> [`nix-command`](@docroot@/development/experimental-features.md#xp-feature-nix-command)
-> experimental feature, and subject to change without notice.
-
 Example: `nixpkgs#hello`
 
 These have the form *flakeref*[`#`*attrpath*], where *flakeref* is a
diff --git a/tests/functional/ca/derivation-json.sh b/tests/functional/ca/derivation-json.sh
index 1e2a8fe35..97f165732 100644
--- a/tests/functional/ca/derivation-json.sh
+++ b/tests/functional/ca/derivation-json.sh
@@ -19,7 +19,7 @@ drvPath3=$(nix derivation add --dry-run < "$TEST_HOME"/foo.json)
 [[ ! -e "$drvPath3" ]]
 
 # But the JSON is rejected without the experimental feature
-expectStderr 1 nix derivation add < "$TEST_HOME"/foo.json --experimental-features nix-command | grepQuiet "experimental Nix feature 'ca-derivations' is disabled"
+expectStderr 1 nix derivation add < "$TEST_HOME"/foo.json --experimental-features '' | grepQuiet "experimental Nix feature 'ca-derivations' is disabled"
 
 # Without --dry-run it is actually written
 drvPath4=$(nix derivation add < "$TEST_HOME"/foo.json)
diff --git a/tests/functional/ca/selfref-gc.sh b/tests/functional/ca/selfref-gc.sh
index 588515db5..a730bdab6 100755
--- a/tests/functional/ca/selfref-gc.sh
+++ b/tests/functional/ca/selfref-gc.sh
@@ -4,7 +4,7 @@ source common.sh
 
 requireDaemonNewerThan "2.4pre20210626"
 
-enableFeatures "ca-derivations nix-command"
+enableFeatures "ca-derivations"
 
 export NIX_TESTS_CA_BY_DEFAULT=1
 cd ..
diff --git a/tests/functional/common/init.sh b/tests/functional/common/init.sh
index 482d62cc4..38b29d122 100755
--- a/tests/functional/common/init.sh
+++ b/tests/functional/common/init.sh
@@ -12,7 +12,6 @@ if isTestOnNixOS; then
   ! test -e "$test_nix_conf"
   cat > "$test_nix_conf_dir/nix.conf" <<EOF
 # TODO: this is not needed for all tests and prevents stable commands from be tested in isolation
-experimental-features = nix-command
 flake-registry = $TEST_ROOT/registry.json
 show-trace = true
 EOF
@@ -47,7 +46,7 @@ cat > "$NIX_CONF_DIR"/nix.conf <<EOF
 build-users-group =
 keep-derivations = false
 sandbox = false
-experimental-features = nix-command
+experimental-features =
 gc-reserved-space = 0
 substituters =
 flake-registry = $TEST_ROOT/registry.json
diff --git a/tests/functional/common/vars-and-functions.sh b/tests/functional/common/vars-and-functions.sh
index e4fd0e78a..9484d6446 100644
--- a/tests/functional/common/vars-and-functions.sh
+++ b/tests/functional/common/vars-and-functions.sh
@@ -123,7 +123,8 @@ startDaemon() {
     fi
     # Start the daemon, wait for the socket to appear.
     rm -f $NIX_DAEMON_SOCKET_PATH
-    PATH=$DAEMON_PATH nix --extra-experimental-features 'nix-command' daemon &
+    # TODO: remove the nix-command feature when we're no longer testing against old daemons.
+    PATH=$DAEMON_PATH nix daemon --extra-experimental-features nix-command &
     _NIX_TEST_DAEMON_PID=$!
     export _NIX_TEST_DAEMON_PID
     for ((i = 0; i < 300; i++)); do
diff --git a/tests/functional/config.sh b/tests/functional/config.sh
index ef4d50731..363120016 100755
--- a/tests/functional/config.sh
+++ b/tests/functional/config.sh
@@ -54,12 +54,12 @@ var=$(nix config show | grep '^allowed-uris =' | cut -d '=' -f 2 | xargs)
 
 # Test that we can !include a file.
 export NIX_USER_CONF_FILES=$here/config/nix-with-bang-include.conf
-var=$(nix config show | grep '^experimental-features =' | cut -d '=' -f 2 | xargs)
-[[ $var == nix-command ]]
+var=$(nix config show | grep '^fsync-metadata =' | cut -d '=' -f 2 | xargs)
+[[ $var == true ]]
 
 # Test that it's possible to load config from the environment
 prev=$(nix config show | grep '^cores' | cut -d '=' -f 2 | xargs)
-export NIX_CONFIG="cores = 4242"$'\n'"experimental-features = nix-command"
+export NIX_CONFIG="cores = 4242"$'\n'
 exp_cores=$(nix config show | grep '^cores' | cut -d '=' -f 2 | xargs)
 exp_features=$(nix config show | grep '^experimental-features' | cut -d '=' -f 2 | xargs)
 [[ $prev != $exp_cores ]]
diff --git a/tests/functional/config/nix-with-bang-include.conf b/tests/functional/config/nix-with-bang-include.conf
index fa600e6ff..033e85481 100644
--- a/tests/functional/config/nix-with-bang-include.conf
+++ b/tests/functional/config/nix-with-bang-include.conf
@@ -1,2 +1,2 @@
-experimental-features = nix-command
+fsync-metadata = true
 !include ./missing-extra-config.conf
\ No newline at end of file
diff --git a/tests/functional/config/nix-with-include.conf b/tests/functional/config/nix-with-include.conf
index 17b8958ba..d8a68d3cf 100644
--- a/tests/functional/config/nix-with-include.conf
+++ b/tests/functional/config/nix-with-include.conf
@@ -1,2 +1 @@
-experimental-features = nix-command
 include ./extra-config.conf
\ No newline at end of file
diff --git a/tests/functional/config/nix-with-substituters.conf b/tests/functional/config/nix-with-substituters.conf
index 90f359a6f..b7a6351be 100644
--- a/tests/functional/config/nix-with-substituters.conf
+++ b/tests/functional/config/nix-with-substituters.conf
@@ -1,2 +1 @@
-experimental-features = nix-command
 substituters = https://example.com
diff --git a/tests/functional/dyn-drv/eval-outputOf.sh b/tests/functional/dyn-drv/eval-outputOf.sh
index 3681bd098..82aa04ca2 100644
--- a/tests/functional/dyn-drv/eval-outputOf.sh
+++ b/tests/functional/dyn-drv/eval-outputOf.sh
@@ -3,7 +3,7 @@
 source ./common.sh
 
 # Without the dynamic-derivations XP feature, we don't have the builtin.
-nix --experimental-features 'nix-command' eval --impure  --expr \
+nix --experimental-features '' eval --impure  --expr \
     'assert ! (builtins ? outputOf); ""'
 
 # Test that a string is required.
@@ -12,14 +12,14 @@ nix --experimental-features 'nix-command' eval --impure  --expr \
 # object that could be coerced to a string. We might liberalise this in
 # the future so it does work, but there are some design questions to
 # resolve first. Adding a test so we don't liberalise it by accident.
-expectStderr 1 nix --experimental-features 'nix-command dynamic-derivations' eval --impure --expr \
+expectStderr 1 nix --experimental-features 'dynamic-derivations' eval --impure --expr \
     'builtins.outputOf (import ../dependencies.nix {}) "out"' \
     | grepQuiet "expected a string but found a set"
 
 # Test that "DrvDeep" string contexts are not supported at this time
 #
 # Like the above, this is a restriction we could relax later.
-expectStderr 1 nix --experimental-features 'nix-command dynamic-derivations' eval --impure --expr \
+expectStderr 1 nix --experimental-features 'dynamic-derivations' eval --impure --expr \
     'builtins.outputOf (import ../dependencies.nix {}).drvPath "out"' \
     | grepQuiet "has a context which refers to a complete source and binary closure. This is not supported at this time"
 
diff --git a/tests/functional/dyn-drv/recursive-mod-json.nix b/tests/functional/dyn-drv/recursive-mod-json.nix
index c6a24ca4f..842f784ae 100644
--- a/tests/functional/dyn-drv/recursive-mod-json.nix
+++ b/tests/functional/dyn-drv/recursive-mod-json.nix
@@ -11,7 +11,7 @@ mkDerivation rec {
   drv = builtins.unsafeDiscardOutputDependency (import ./text-hashed-output.nix).hello.drvPath;
 
   buildCommand = ''
-    export NIX_CONFIG='experimental-features = nix-command ca-derivations'
+    export NIX_CONFIG='experimental-features = ca-derivations'
 
     PATH=${builtins.getEnv "EXTRA_PATH"}:$PATH
 
diff --git a/tests/functional/experimental-features.sh b/tests/functional/experimental-features.sh
index d6f7f9e56..43514e229 100755
--- a/tests/functional/experimental-features.sh
+++ b/tests/functional/experimental-features.sh
@@ -11,12 +11,12 @@ source common.sh
 # # With flakes, flake options should show up
 #
 # function grep_both_ways {
-#     nix --experimental-features 'nix-command' "$@" | grepQuietInverse flake
-#     nix --experimental-features 'nix-command' "$@" | grepQuiet flake
+#     nix --experimental-features '' "$@" | grepQuietInverse flake
+#     nix --experimental-features '' "$@" | grepQuiet flake
 #
 #     # Also, the order should not matter
-#     nix "$@" --experimental-features 'nix-command' | grepQuietInverse flake
-#     nix "$@" --experimental-features 'nix-command' | grepQuiet flake
+#     nix "$@" --experimental-features '' | grepQuietInverse flake
+#     nix "$@" --experimental-features '' | grepQuiet flake
 # }
 #
 # # Simple case, the configuration effects the running command
@@ -34,7 +34,7 @@ gatedSetting=auto-allocate-uids
 
 # Experimental feature is disabled before, ignore and warn.
 NIX_CONFIG="
-  experimental-features = nix-command
+  experimental-features =
   $gatedSetting = true
 " expect 1 nix config show $gatedSetting 1>"$TEST_ROOT"/stdout 2>"$TEST_ROOT"/stderr
 [[ $(cat "$TEST_ROOT/stdout") = '' ]]
@@ -43,14 +43,14 @@ grepQuiet "error: could not find setting '$gatedSetting'" "$TEST_ROOT/stderr"
 # Experimental feature is disabled after, ignore and warn.
 NIX_CONFIG="
   $gatedSetting = true
-  experimental-features = nix-command
+  experimental-features =
 " expect 1 nix config show $gatedSetting 1>"$TEST_ROOT"/stdout 2>"$TEST_ROOT"/stderr
 [[ $(cat "$TEST_ROOT/stdout") = '' ]]
 grepQuiet "error: could not find setting '$gatedSetting'" "$TEST_ROOT/stderr"
 
 # Experimental feature is enabled before, process.
 NIX_CONFIG="
-  experimental-features = nix-command $xpFeature
+  experimental-features = $xpFeature
   $gatedSetting = true
 " nix config show $gatedSetting 1>"$TEST_ROOT"/stdout 2>"$TEST_ROOT"/stderr
 grepQuiet "true" "$TEST_ROOT/stdout"
@@ -58,18 +58,18 @@ grepQuiet "true" "$TEST_ROOT/stdout"
 # Experimental feature is enabled after, process.
 NIX_CONFIG="
   $gatedSetting = true
-  experimental-features = nix-command $xpFeature
+  experimental-features = $xpFeature
 " nix config show $gatedSetting 1>"$TEST_ROOT"/stdout 2>"$TEST_ROOT"/stderr
 grepQuiet "true" "$TEST_ROOT/stdout"
 grepQuietInverse "Ignoring setting '$gatedSetting'" "$TEST_ROOT/stderr"
 
 function exit_code_both_ways {
-    expect 1 nix --experimental-features 'nix-command ' "$@" 1>/dev/null
-    nix --experimental-features "nix-command $xpFeature" "$@" 1>/dev/null
+    expect 1 nix --experimental-features '' "$@" 1>/dev/null
+    nix --experimental-features "$xpFeature" "$@" 1>/dev/null
 
     # Also, the order should not matter
-    expect 1 nix "$@" --experimental-features 'nix-command' 1>/dev/null
-    nix "$@" --experimental-features "nix-command $xpFeature" 1>/dev/null
+    expect 1 nix "$@" --experimental-features '' 1>/dev/null
+    nix "$@" --experimental-features "$xpFeature" 1>/dev/null
 }
 
 exit_code_both_ways config show --auto-allocate-uids
@@ -79,12 +79,3 @@ nix --experimental-features '' --help 1>/dev/null
 nix --experimental-features '' doctor --help 1>/dev/null
 nix --experimental-features '' repl --help 1>/dev/null
 nix --experimental-features '' upgrade-nix --help 1>/dev/null
-
-# These 3 arguments are currently given to all commands, which is wrong (as not
-# all care). To deal with fixing later, we simply make them require the
-# nix-command experimental features --- it so happens that the commands we wish
-# stabilizing to do not need them anyways.
-for arg in '--print-build-logs' '--offline' '--refresh'; do
-    nix --experimental-features 'nix-command' "$arg" --help 1>/dev/null
-    expect 1 nix --experimental-features '' "$arg" --help 1>/dev/null
-done
diff --git a/tests/functional/impure-derivations.sh b/tests/functional/impure-derivations.sh
index 5dea220fe..69884c293 100755
--- a/tests/functional/impure-derivations.sh
+++ b/tests/functional/impure-derivations.sh
@@ -21,7 +21,7 @@ drvPath2=$(nix derivation add < $TEST_HOME/impure-drv.json)
 [[ "$drvPath" = "$drvPath2" ]]
 
 # But only with the experimental feature!
-expectStderr 1 nix derivation add < $TEST_HOME/impure-drv.json --experimental-features nix-command | grepQuiet "experimental Nix feature 'impure-derivations' is disabled"
+expectStderr 1 nix derivation add < $TEST_HOME/impure-drv.json --experimental-features '' | grepQuiet "experimental Nix feature 'impure-derivations' is disabled"
 
 nix build --dry-run --json --file ./impure-derivations.nix impure.all
 json=$(nix build -L --no-link --json --file ./impure-derivations.nix impure.all)
diff --git a/tests/functional/recursive.nix b/tests/functional/recursive.nix
index fa8cc04db..622049dca 100644
--- a/tests/functional/recursive.nix
+++ b/tests/functional/recursive.nix
@@ -14,7 +14,7 @@ mkDerivation rec {
 
   buildCommand = ''
     mkdir $out
-    opts="--experimental-features nix-command ${if (NIX_TESTS_CA_BY_DEFAULT == "1") then "--extra-experimental-features ca-derivations" else ""}"
+    opts="${if (NIX_TESTS_CA_BY_DEFAULT == "1") then "--extra-experimental-features ca-derivations" else ""}"
 
     PATH=${builtins.getEnv "NIX_BIN_DIR"}:$PATH
 
diff --git a/tests/functional/recursive.sh b/tests/functional/recursive.sh
index 640fb92d2..fb0aa6975 100755
--- a/tests/functional/recursive.sh
+++ b/tests/functional/recursive.sh
@@ -13,7 +13,7 @@ rm -f $TEST_ROOT/result
 
 export unreachable=$(nix store add-path ./recursive.sh)
 
-NIX_BIN_DIR=$(dirname $(type -p nix)) nix --extra-experimental-features 'nix-command recursive-nix' build -o $TEST_ROOT/result -L --impure --file ./recursive.nix
+NIX_BIN_DIR=$(dirname $(type -p nix)) nix --extra-experimental-features 'recursive-nix' build -o $TEST_ROOT/result -L --impure --file ./recursive.nix
 
 [[ $(cat $TEST_ROOT/result/inner1) =~ blaat ]]
 
diff --git a/tests/installer/default.nix b/tests/installer/default.nix
index 4aed6eae4..3b75c5e0f 100644
--- a/tests/installer/default.nix
+++ b/tests/installer/default.nix
@@ -224,7 +224,7 @@ let
           source /etc/bashrc || true
 
           nix-env --version
-          nix --extra-experimental-features nix-command store info
+          nix store info
 
           out=\$(nix-build --no-substitute -E 'derivation { name = "foo"; system = "x86_64-linux"; builder = "/bin/sh"; args = ["-c" "echo foobar > \$out"]; }')
           [[ \$(cat \$out) = foobar ]]
diff --git a/tests/nixos/authorization.nix b/tests/nixos/authorization.nix
index fdeae06ed..d80069e77 100644
--- a/tests/nixos/authorization.nix
+++ b/tests/nixos/authorization.nix
@@ -10,8 +10,6 @@
     users.users.alice.isNormalUser = true;
     users.users.bob.isNormalUser = true;
     users.users.mallory.isNormalUser = true;
-
-    nix.settings.experimental-features = "nix-command";
   };
 
   testScript =
diff --git a/tests/nixos/containers/containers.nix b/tests/nixos/containers/containers.nix
index 6773f5628..188012c9b 100644
--- a/tests/nixos/containers/containers.nix
+++ b/tests/nixos/containers/containers.nix
@@ -18,7 +18,7 @@
           nix.settings.substituters = lib.mkForce [ ];
           nix.extraOptions =
             ''
-              extra-experimental-features = nix-command auto-allocate-uids cgroups
+              extra-experimental-features = auto-allocate-uids cgroups
               extra-system-features = uid-range
             '';
           nix.nixPath = [ "nixpkgs=${nixpkgs}" ];
diff --git a/tests/nixos/fetch-git/testsupport/setup.nix b/tests/nixos/fetch-git/testsupport/setup.nix
index a81d5614b..08195daa5 100644
--- a/tests/nixos/fetch-git/testsupport/setup.nix
+++ b/tests/nixos/fetch-git/testsupport/setup.nix
@@ -74,7 +74,6 @@ in
       environment.variables = {
         _NIX_FORCE_HTTP = "1";
       };
-      nix.settings.experimental-features = ["nix-command" "flakes"];
     };
     setupScript = ''
     '';
diff --git a/tests/nixos/git-submodules.nix b/tests/nixos/git-submodules.nix
index 570b1822b..6bcb75b5e 100644
--- a/tests/nixos/git-submodules.nix
+++ b/tests/nixos/git-submodules.nix
@@ -20,7 +20,6 @@
           {
             programs.ssh.extraConfig = "ConnectTimeout 30";
             environment.systemPackages = [ pkgs.git ];
-            nix.extraOptions = "experimental-features = nix-command flakes";
           };
       };
 
diff --git a/tests/nixos/github-flakes.nix b/tests/nixos/github-flakes.nix
index 9a1ed749c..37ffa2b70 100644
--- a/tests/nixos/github-flakes.nix
+++ b/tests/nixos/github-flakes.nix
@@ -143,7 +143,6 @@ in
           virtualisation.additionalPaths = [ pkgs.hello pkgs.fuse ];
           virtualisation.memorySize = 4096;
           nix.settings.substituters = lib.mkForce [ ];
-          nix.extraOptions = "experimental-features = nix-command";
           networking.hosts.${(builtins.head nodes.github.networking.interfaces.eth1.ipv4.addresses).address} =
             [ "channels.nixos.org" "api.github.com" "github.com" ];
           security.pki.certificateFiles = [ "${cert}/ca.crt" ];
diff --git a/tests/nixos/nix-copy.nix b/tests/nixos/nix-copy.nix
index 7db5197aa..cd0cca63b 100644
--- a/tests/nixos/nix-copy.nix
+++ b/tests/nixos/nix-copy.nix
@@ -23,7 +23,6 @@ in {
         { virtualisation.writableStore = true;
           virtualisation.additionalPaths = [ pkgA pkgD.drvPath ];
           nix.settings.substituters = lib.mkForce [ ];
-          nix.settings.experimental-features = [ "nix-command" ];
           services.getty.autologinUser = "root";
           programs.ssh.extraConfig = ''
             Host *
diff --git a/tests/nixos/sourcehut-flakes.nix b/tests/nixos/sourcehut-flakes.nix
index 4eeab42db..a1422ab96 100644
--- a/tests/nixos/sourcehut-flakes.nix
+++ b/tests/nixos/sourcehut-flakes.nix
@@ -104,7 +104,6 @@ in
             virtualisation.memorySize = 4096;
             nix.settings.substituters = lib.mkForce [ ];
             nix.extraOptions = ''
-              experimental-features = nix-command
               flake-registry = https://git.sr.ht/~NixOS/flake-registry/blob/master/flake-registry.json
             '';
             environment.systemPackages = [ pkgs.jq ];
diff --git a/tests/nixos/tarball-flakes.nix b/tests/nixos/tarball-flakes.nix
index 2a21d8738..e0327cac5 100644
--- a/tests/nixos/tarball-flakes.nix
+++ b/tests/nixos/tarball-flakes.nix
@@ -51,7 +51,6 @@ in
           virtualisation.additionalPaths = [ pkgs.hello pkgs.fuse ];
           virtualisation.memorySize = 4096;
           nix.settings.substituters = lib.mkForce [ ];
-          nix.extraOptions = "experimental-features = nix-command";
         };
     };
 
diff --git a/tests/repl-completion.nix b/tests/repl-completion.nix
index 3ba198a98..5cca0fc1c 100644
--- a/tests/repl-completion.nix
+++ b/tests/repl-completion.nix
@@ -10,7 +10,7 @@ runCommand "repl-completion" {
   ];
   expectScript = ''
     # Regression https://github.com/NixOS/nix/pull/10778
-    spawn nix repl --offline --extra-experimental-features nix-command
+    spawn nix repl --offline
     expect "nix-repl>"
     send "foo = import ./does-not-exist.nix\n"
     expect "nix-repl>"
@@ -37,4 +37,4 @@ runCommand "repl-completion" {
   nix-store --init
   expect $expectScriptPath
   touch $out
-''
\ No newline at end of file
+''