add: assigment 2

assignment2/default.nix

@@ -0,0 +1,26 @@
+let
+  basic-c = subdir: name: { stdenv }:
+    stdenv.mkDerivation {
+      inherit name;
+      src = ./.;
+      buildPhase = ''
+        runHook preBuild
+        gcc ${subdir}/${name}.c -o ${name}
+        runHook postBuild
+      '';
+      installPhase = ''
+        runHook preInstall
+        mkdir -p $out/bin
+        install ${name} $out/bin/
+        runHook postInstall
+      '';
+    };
+in {
+  a2-p1-producer = basic-c "part1" "producer";
+  a2-p1-consumer = basic-c "part1" "consumer";
+
+  a2-p2-bidirectional = basic-c "part2" "bidirectional";
+
+  a2-p3-producer = basic-c "part3" "producer";
+  a2-p3-consumer = basic-c "part3" "consumer";
+}