Add --needed to pacman invocation

When installing build packages, we might install packages that were
already installed previously. Let's make sure we don't reinstall
those.

diff --git a/mkosi/distributions/arch.py b/mkosi/distributions/arch.py
index df7ffbb10c15b0582c80d57c426c200249ea63dd..6a309ed24a887816ec0836600b932e82b33eff5b 100644 (file)
--- a/mkosi/distributions/arch.py
+++ b/mkosi/distributions/arch.py
@@ -94,6 +94,7 @@ def invoke_pacman(state: MkosiState, packages: Sequence[str]) -> None:
         "pacman",
         "--config", state.workspace / "pacman.conf",
         "--noconfirm",
+        "--needed",
         "-Sy", *sort_packages(packages),
     ]