Fix boolean condition

Author: f-f

src/Spago/Command/Fetch.purs

@@ -179,12 +179,14 @@ run { packages: packagesRequestedToInstall, ensureRanges, isTest, isRepl } = do
     -- For solver-based projects, always ensure ranges (they're required for the solver to work)
     -- For package-set projects, only add ranges if explicitly requested
     -- Note: we can only add ranges if we have a target package (selected or root)
+    -- If user explicitly passed --ensure-ranges, we should error if there's no target package
+    -- If it's implicitly enabled (solver build), we silently skip when there's no target
     let
       isSolverBuild = case currentWorkspace.packageSet.buildType of
         RegistrySolverBuild _ -> true
         PackageSetBuild _ _ -> false
       hasTargetPackage = isJust currentWorkspace.selected || isJust currentWorkspace.rootPackage
-      shouldEnsureRanges = (ensureRanges || isSolverBuild) && hasTargetPackage
+      shouldEnsureRanges = ensureRanges || (isSolverBuild && hasTargetPackage)
 
     when shouldEnsureRanges do
       { configPath, package, yamlDoc } <- getPackageConfigPath "in which to add ranges."