diff --git a/pkgs/development/tools/cosmocc/default.nix b/pkgs/development/tools/cosmocc/default.nix
new file mode 100644
index 000000000000..71028d1a1968
--- /dev/null
+++ b/pkgs/development/tools/cosmocc/default.nix
@@ -0,0 +1,35 @@
+{ runCommand, lib, cosmopolitan }:
+
+let
+  cosmocc =
+    runCommand "cosmocc"
+      {
+        pname = "cosmocc";
+        inherit (cosmopolitan) version;
+
+        meta = with lib; {
+          homepage = "https://justine.lol/cosmopolitan/";
+          description = "compilers for Cosmopolitan C/C++ programs";
+          license = licenses.mit;
+          maintainers = teams.cosmopolitan.members;
+        };
+        passthru.tests = {
+          cc = runCommand "c-test" { } ''
+            cat > hello.c << END
+            #include <stdio.h>
+            int main() {
+              printf("Hello world!\n");
+              return 0;
+            }
+            END
+            ${cosmocc}/bin/cosmocc hello.c
+            ./a.out > $out
+          '';
+        };
+      } ''
+      mkdir -p $out/bin
+      install ${cosmopolitan.dist}/tool/scripts/{cosmocc,cosmoc++} $out/bin
+      sed 's|/opt/cosmo\([ /]\)|${cosmopolitan.dist}\1|g' -i $out/bin/*
+    '';
+in
+cosmocc
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9bf74f533f8b..86bdd538cd92 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19293,6 +19293,8 @@ with pkgs;
 
   cog = callPackage ../development/web/cog { };
 
+  cosmocc = callPackage ../development/tools/cosmocc { };
+
   cosmopolitan = callPackage ../development/libraries/cosmopolitan { };
 
   python-cosmopolitan = callPackage ../development/interpreters/python-cosmopolitan { };