do.go                          |  3 ---
 doc/INSTALL                    |  2 +-
 doc/NEWS                       |  5 +++++
 doc/Rules                      |  4 +++-
 ood.go                         | 12 ++----------
 run.go                         | 13 -------------
 t/goredo-already-existing.t    | 24 ------------------------
 t/goredo-externally-modified.t | 25 +++++++++++++++++++++++++
 usage.go                       |  2 +-

diff --git a/do.go b/do.go
index edacb328582c61b7826c1d626c571870975774c32864d49e089bb81e1702290e..30f544f903b56af3c488f05a5025312280a78d851fcaf132a75b6e503c61c3cb 100644
--- a/do.go
+++ b/do.go
@@ -34,9 +34,6 @@ func existsDo(w io.Writer, fdDepName, cwd, pth string) (bool, error) {
 	if FileExists(path.Join(cwd, pth)) {
 		return true, nil
 	}
-	if w == nil {
-		return false, nil
-	}
 	return false, ifcreate(w, fdDepName, pth)
 }
 
diff --git a/doc/INSTALL b/doc/INSTALL
index 1d49311af23def4d1f040f8bc41fd6ac685b5aa7bcf87f5acaca49b0061f6768..0fe476468fce5e1750b521f1ccc812b428db7c941c202e5d7563f2bbdfe8aa54 100644
--- a/doc/INSTALL
+++ b/doc/INSTALL
@@ -11,7 +11,7 @@ => https://github.com/NixOS/nixpkgs/tree/master/pkgs/by-name/go/goredo NixOS packages
 
 Preferable way is to [Download] tarball with the signature from website:
 
-    $ v=2.9.2
+    $ v=2.10.0
     $ fetch http://www.goredo.stargrave.org/download/goredo-$v.tar.zst
     $ fetch http://www.goredo.stargrave.org/download/goredo-$v.tar.zst.{sig,cm}
     [Integrity] verify
diff --git a/doc/NEWS b/doc/NEWS
index 19fa8d6540562927b99616e2cd0f7c6806212e21b9e847148bc51ef340f80ae9..b0cfc0adbb056815dfd1ad48b67598896e6a1dea00ef630c6d2a7acd7d27c4b4 100644
--- a/doc/NEWS
+++ b/doc/NEWS
@@ -1,3 +1,8 @@
+A 2.10.0
+2.10.0
+    * Treat all existing files without correponding .dep as a
+      source files.
+
 A 2.9.2
 2.9.2
     * Change Go's module namespace and related dependencies from
diff --git a/doc/Rules b/doc/Rules
index 9cda1a6a78af9e11d81c4064a79256d779705c41e87872f6c5725fef8a1957ab..bee85d5d558fb2d013f525c05a6e89bc18b3e6b37aec170b0ad289a4d0bdf5a0 100644
--- a/doc/Rules
+++ b/doc/Rules
@@ -1,3 +1,5 @@
+* Source file is already existing file created outside redo's control.
+
 * Target is the single file.
   Target's result probably won't create file at all.
 
@@ -35,7 +37,7 @@ * .do file search goes up to / by default, but can be limited with
   either $REDO_TOP_DIR environment variable, or by having .redo/top file
   in it.
 
-* .do runs in the same directory where it is placed.
+* .do runs in the same directory where it is located.
 
 * .do runs with the three arguments:
     * $1 -- name of the target.
diff --git a/ood.go b/ood.go
index 57dd301e5c4b1bd2c0239994a35718472fa7031226e5a9b21f1063160c485627..65a209558e14e7c16900d1e9a656482f755b81420c286923dcc57265e0faee67 100644
--- a/ood.go
+++ b/ood.go
@@ -25,7 +25,6 @@ 	"io"
 	"io/fs"
 	"log"
 	"os"
-	"path"
 	"strings"
 
 	"golang.org/x/sys/unix"
@@ -72,14 +71,10 @@ 	return fmt.Sprintf("%s: %s", e.Tgt, e.Err)
 }
 
 func isSrc(tgt *Tgt) bool {
-	if !FileExists(tgt.a) {
-		return false
-	}
-	tgtH, tgtT := pathSplit(tgt.a)
-	if do, _, _ := findDo(nil, tgt.a, tgtH, tgtT); do != "" {
+	if FileExists(tgt.dep) {
 		return false
 	}
-	return true
+	return FileExists(tgt.a)
 }
 
 func isOODByBuildUUID(tgt *Tgt) bool {
@@ -104,9 +99,6 @@ 			if errors.Is(err, fs.ErrNotExist) {
 				if isSrc(tgt) {
 					ood = false
 					tracef(CDebug, "ood: %s%s -> is source", indent, tgt)
-				} else if path.Ext(tgt.a) == ".do" {
-					ood = false
-					tracef(CDebug, "ood: %s%s -> is .do", indent, tgt)
 				} else {
 					ood = true
 					tracef(CDebug, "ood: %s%s -> no dep: %s", indent, tgt, tgt.dep)
diff --git a/run.go b/run.go
index 7ab143f0a98dbb7aed80a85855205b5b353371bfe7a6a913c6b42769d414711a..3f19556907a36c2fb4191934a60491edc95b2e77c016d4fbc7caf6c90b9a992f 100644
--- a/run.go
+++ b/run.go
@@ -300,19 +300,6 @@ 			Jobs.Done()
 		}()
 		return nil
 	}
-	if inodePrev == nil && FileExists(tgt.a) {
-		lockRelease()
-		if StopIfMod {
-			return fmt.Errorf("%s already existing", tgt)
-		}
-		Jobs.Add(1)
-		tracef(CWarn, "%s: already existing: not redoing", tgt)
-		go func() {
-			errs <- nil
-			Jobs.Done()
-		}()
-		return nil
-	}
 	dep = nil
 
 	// Start preparing .dep
diff --git a/t/goredo-already-existing.t b/t/goredo-already-existing.t
deleted file mode 100755
index fb358f6c51cd8b4bde8eb6c0adfe32a7de136ca4127a34c0acd51bbf19b5281c..0000000000000000000000000000000000000000
--- a/t/goredo-already-existing.t
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/bin/sh
-
-test_description="Check failing if \$1 already exists"
-. $SHARNESS_TEST_SRCDIR/sharness.sh
-export REDO_TOP_DIR="`pwd`" REDO_NO_PROGRESS=1
-
-echo echo ok >foo.do
-touch foo
-test_expect_success "does not fail" "redo foo 2>out"
-test_expect_success "message" 'grep -q "already existing" out'
-
-export REDO_STOP_IF_MODIFIED=1
-test_expect_success "must fail" 'redo foo 2>out ; [ $? = 1 ]'
-unset REDO_STOP_IF_MODIFIED
-test_expect_success "message" 'grep -q "already existing" out'
-
-rm foo
-test_expect_success "ok" "redo foo"
-
-echo overwrite >foo
-test_expect_success "externally modified" "redo foo 2>out"
-test_expect_success "message" 'grep -q "externally modified" out'
-
-test_done
diff --git a/t/goredo-externally-modified.t b/t/goredo-externally-modified.t
new file mode 100755
index 0000000000000000000000000000000000000000..254f50ca23a1652fc3da4c9d2463d2109c439ccc85961ce562c2e6b5df5d39ce
--- /dev/null
+++ b/t/goredo-externally-modified.t
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+test_description="Check externally modified"
+. $SHARNESS_TEST_SRCDIR/sharness.sh
+export REDO_TOP_DIR="`pwd`" REDO_NO_PROGRESS=1
+
+echo echo ok >foo.do
+redo foo
+echo >foo
+test_expect_success "does not fail" "redo foo 2>out"
+test_expect_success "message" 'grep -q "externally modified" out'
+
+export REDO_STOP_IF_MODIFIED=1
+test_expect_success "must fail" 'redo foo 2>out ; [ $? = 1 ]'
+unset REDO_STOP_IF_MODIFIED
+test_expect_success "message" 'grep -q "externally modified" out'
+
+rm foo
+test_expect_success "ok" "redo foo"
+
+echo overwrite >foo
+test_expect_success "externally modified" "redo foo 2>out"
+test_expect_success "message" 'grep -q "externally modified" out'
+
+test_done
diff --git a/usage.go b/usage.go
index 624f913d008f0ddeeeccee48d86f891f246987aca84b67b62c66d91d324789a1..d739f8f77033179e30e22b65258e916a85b0b038756cac307330a9a080381043 100644
--- a/usage.go
+++ b/usage.go
@@ -24,7 +24,7 @@ 	"strings"
 )
 
 const (
-	Version  = "2.9.2"
+	Version  = "2.10.0"
 	Warranty = `Copyright (C) 2020-2026 Sergey Matveev
 
 This program is free software: you can redistribute it and/or modify