diff --git a/nixos/modules/installer/tools/nix-fallback-paths.nix b/nixos/modules/installer/tools/nix-fallback-paths.nix
index f9ea7eb39597..728dae200c15 100644
--- a/nixos/modules/installer/tools/nix-fallback-paths.nix
+++ b/nixos/modules/installer/tools/nix-fallback-paths.nix
@@ -1,7 +1,8 @@
 {
-  x86_64-linux = "/nix/store/f409bhlpp0xkzvdz95qr2yvfjfi8r9jc-nix-2.18.5";
-  i686-linux = "/nix/store/ra39jzrxq3bcpf55aahwv5037akvylf5-nix-2.18.5";
-  aarch64-linux = "/nix/store/xiw8a4jbnw18svgdb04hyqzg5bsjspqf-nix-2.18.5";
-  x86_64-darwin = "/nix/store/k2gzx7i90x3h2c8g6xdi1jkwbl6ic895-nix-2.18.5";
-  aarch64-darwin = "/nix/store/rqwymbndaqxma6p8s5brcl9k32n5xx54-nix-2.18.5";
+  x86_64-linux = "/nix/store/s429drnj3jp5dbxib74r3q0rypknvw48-nix-2.24.7";
+  i686-linux = "/nix/store/1ysk63fwjvx4whxqpka1x4lyjb4m5576-nix-2.24.7";
+  aarch64-linux = "/nix/store/8av0avdm2anwmvf9qka02cz093599rw7-nix-2.24.7";
+  riscv64-linux = "/nix/store/b70zcmr3zrd7q569zzpz8dln93d3sx39-nix-riscv64-unknown-linux-gnu-2.24.7";
+  x86_64-darwin = "/nix/store/gba97bmnyrp6x936kr8zqc2mkhcrz1vf-nix-2.24.7";
+  aarch64-darwin = "/nix/store/7mb1mcpmjphg5bgc8m7m0gxrsshrzsk7-nix-2.24.7";
 }
diff --git a/pkgs/by-name/ni/nix-plugin-pijul/package.nix b/pkgs/by-name/ni/nix-plugin-pijul/package.nix
index 0b78c43ba6f1..52538d48878c 100644
--- a/pkgs/by-name/ni/nix-plugin-pijul/package.nix
+++ b/pkgs/by-name/ni/nix-plugin-pijul/package.nix
@@ -6,7 +6,6 @@
   pkg-config,
   boost,
   howard-hinnant-date,
-  nix,
 
   # for tests
   runCommand,
@@ -31,7 +30,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     boost
     howard-hinnant-date
-    nix
+    nixVersions.nix_2_18
   ];
 
   passthru.tests = let
diff --git a/pkgs/development/libraries/nix-plugins/default.nix b/pkgs/development/libraries/nix-plugins/default.nix
index 8714c6b4037a..0da1d1d917f2 100644
--- a/pkgs/development/libraries/nix-plugins/default.nix
+++ b/pkgs/development/libraries/nix-plugins/default.nix
@@ -2,18 +2,21 @@
 
 stdenv.mkDerivation rec {
   pname = "nix-plugins";
-  version = "14.0.0";
+  version = "15.0.0";
 
   src = fetchFromGitHub {
     owner = "shlevy";
     repo = "nix-plugins";
     rev = version;
-    hash = "sha256-RDKAuLwcZ3Pbn5JUDmGBcfD0xbM6Jud2ouXh/YKpfS8=";
+    hash = "sha256-C4VqKHi6nVAHuXVhqvTRRyn0Bb619ez4LzgUWPH1cbM=";
   };
 
   nativeBuildInputs = [ cmake pkg-config ];
 
-  buildInputs = [ nix boost ];
+  buildInputs = [
+    nix
+    boost
+  ];
 
   meta = {
     description = "Collection of miscellaneous plugins for the nix expression language";
diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index 38cd370d064a..f6c25ade7219 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -265,7 +265,7 @@ in lib.makeExtensible (self: ({
     else
       nix;
 
-  stable = addFallbackPathsCheck self.nix_2_18;
+  stable = addFallbackPathsCheck self.nix_2_24;
 } // lib.optionalAttrs config.allowAliases (
   lib.listToAttrs (map (
     minor: