musl linux compilation working from now on

packaging/musl/default.nix

@@ -157,9 +157,14 @@ bootstrapRustPlatform.buildRustPackage {
   SQLX_OFFLINE = "true";
   RUSTFLAGS = "-Ctarget-feature=+crt-static";
 
+  preBuild = ''
+    cp -r ${source}/.sqlx .sqlx
+  '';
+
   postInstall = ''
-    file "$out/bin/server" | grep -q 'statically linked'
+    test -x "$out/bin/server"
     ! readelf -l "$out/bin/server" | grep -q 'Requesting program interpreter'
+    ! readelf -d "$out/bin/server" | grep -q '(NEEDED)'
   '';
 
   meta = {