feat(back): #1432 support experimental-features

.gitignore

@@ -1,3 +1,4 @@
 __pycache__
 .vscode
 node_modules
+result

.mailmap

@@ -31,8 +31,10 @@ Julian Gomez <60365681+jgomezb11@users.noreply.github.com> Julian Gomez <6036568
 Julian Gomez <jgomezb11@eafit.edu.co> Julian Gomez <jgomezb11@eafit.edu.co>
 Karen Camargo <kjcamargo19@gmail.com> Karen Camargo <kjcamargo19@gmail.com>
 Kevin Amado <kamadorueda@gmail.com> Kevin Amado <kamadorueda@gmail.com>
+Luis Saavedra <40694133+ludsrill@users.noreply.github.com> Luis Saavedra <40694133+ludsrill@users.noreply.github.com>
 Luis Saavedra <lsaavedra@fluidattacks.com> Luis David Saavedra <40694133+ludsrill@users.noreply.github.com>
 Luis Saavedra <lsaavedra@fluidattacks.com> Luis Saavedra <lsaavedra@fluidattacks.com>
+Luis Saavedra <luisdavidsag@gmail.com> Luis Saavedra <luisdavidsag@gmail.com>
 Robin Hafid <rohaquinlop301@gmail.com> Robin Hafid <rohaquinlop301@gmail.com>
 Robin Quintero <rohaquinlop301@gmail.com> Robin Quintero <rohaquinlop301@gmail.com>
 Sebastian Cardona <sebas03181@gmail.com> Sebastian Cardona <132764573+sebas031811@users.noreply.github.com>

src/cli/main/cli.py

@@ -277,6 +277,7 @@ def _nix_build(
         *["--argstr", "projectSrc", head],
         *["--argstr", "attrPaths", attr_paths],
         *["--attr", attr],
+        *["--option", "experimental-features", "flakes nix-command"],
         *["--option", "cores", "0"],
         *["--option", "narinfo-cache-negative-ttl", "1"],
         *["--option", "narinfo-cache-positive-ttl", "1"],
@@ -294,6 +295,7 @@ def _nix_hashes(paths: bytes) -> List[str]:
     cmd = [
         "xargs",
         f"{__NIX__}/bin/nix-store",
+        "--option", "experimental-features", "flakes nix-command",
         "--query",
         "--hash",
     ]
@@ -306,13 +308,18 @@ def _nix_hashes(paths: bytes) -> List[str]:
 
 def _nix_build_requisites(path: str) -> List[Tuple[str, str]]:
     """Answer the question: what do I need to build `out`."""
-    cmd = [f"{__NIX__}/bin/nix-store", "--query", "--deriver", path]
+    cmd = [f"{__NIX__}/bin/nix-store",
+           "--option", "experimental-features", "flakes nix-command",
+           "--query",
+           "--deriver",
+           path]
     out, stdout, _ = _run_outputs(cmd, stderr=None)
     if out != 0:
         raise SystemExit(out)
 
     cmd = [
         f"{__NIX__}/bin/nix-store",
+        "--option", "experimental-features", "flakes nix-command",
         "--query",
         "--requisites",
         "--include-outputs",