fix comments

Author: savil

internal/devpkg/narinfo_cache.go

@@ -27,7 +27,7 @@ func (p *Package) IsInBinaryCache() (bool, error) {
 	if p.PatchGlibc {
 		return false, nil
 	}
-	// Packages with non-default outputs are not used to be taken from the binary cache.
+	// Packages with non-default outputs are not to be taken from the binary cache.
 	if len(p.Outputs) > 0 {
 		return false, nil
 	}

internal/shellgen/flake_input.go

@@ -56,7 +56,7 @@ type SymlinkJoin struct {
 }
 
 // BuildInputsForSymlinkJoin returns a list of SymlinkJoin objects that can be used
-// as the buildInput. Used for packages that have non-default outputs that needs to
+// as the buildInput. Used for packages that have non-default outputs that need to
 // be combined into a single buildInput.
 func (f *flakeInput) BuildInputsForSymlinkJoin() ([]*SymlinkJoin, error) {
 	joins := []*SymlinkJoin{}