Working proof of concept for garlic experiments

bsc/garlic/ppong/default.nix

@@ -12,12 +12,22 @@ stdenv.mkDerivation {
     sha256 = "0d1w72gq9627448cb7ykknhgp2wszwd117dlbalbrpf7d0la8yc0";
   };
 
-  dontUnpack = true;
+  unpackCmd = ''
+    mkdir src
+    cp $src src/ppong.c
+  '';
+
+  dontConfigure = true;
 
   buildPhase = ''
-    pwd
-    ls -la
-    mpicc PPong.c -o ppong
+    echo mpicc -include stdlib.h ppong.c -o ppong
+    mpicc -include stdlib.h ppong.c -o ppong
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp ppong $out/bin/ppong
+    ln -s $out/bin/ppong $out/bin/run
   '';
 
   buildInputs = [ mpi ];