do.go                                       |  3 +++
 doc/news.texi                               |  7 +++++++
 ood.go                                      |  6 ++----
 t/apenwarr-120-defaults-flat.t              |  1 -
 t/apenwarr/120-defaults-flat/.gitignore     |  6 ------
 t/apenwarr/120-defaults-flat/all.do         |  1 -
 t/apenwarr/120-defaults-flat/c.c.c.b.b.a    |  1 -
 t/apenwarr/120-defaults-flat/c.do           |  3 ---
 t/apenwarr/120-defaults-flat/clean.do       |  2 --
 t/apenwarr/120-defaults-flat/default.b.do   | 10 ----------
 t/apenwarr/120-defaults-flat/default.c.c.do |  4 ----
 t/apenwarr/120-defaults-flat/default.c.do   |  4 ----
 t/apenwarr/120-defaults-flat/default.do     |  4 ----
 t/goredo-rel-ifcreate.t                     | 24 ++++++++++++------------
 usage.go                                    |  2 +-

diff --git a/do.go b/do.go
index 6dbbba24b8a61d8e5e40c0145ed52dbaf1567ba9112274b5b2dd722d4ab75c93..96132ae7d28623083c1df9c0f3e1be721a4f08e82b694c1f2735b25863ba7d24 100644
--- a/do.go
+++ b/do.go
@@ -34,6 +34,9 @@ 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/news.texi b/doc/news.texi
index 72cfc3a79a507ef4f36384145be307e045ae65686d68dee762e3f1a511dd6fc9..f8c3c7969e6178564aff12f67e4c22d525a4e640a0ea93c16c6a997a16a36ccf 100644
--- a/doc/news.texi
+++ b/doc/news.texi
@@ -2,6 +2,13 @@ @node News
 @cindex news
 @unnumbered News
 
+@anchor{Release 2_7_0}
+@section Release 2.7.0
+@itemize
+@item
+    Proper @file{.do} file searching during source file determination.
+@end itemize
+
 @anchor{Release 2_6_5}
 @section Release 2.6.5
 @itemize
diff --git a/ood.go b/ood.go
index 232f575e74a19b9bc27f8ffe79f21ed22e89bb3ee2839015db5ab8b005ee52a0..dc45d317f906358beb54abc700390c4b1f456b6092c12152f56e5316080c0042 100644
--- a/ood.go
+++ b/ood.go
@@ -74,10 +74,8 @@ func isSrc(tgt *Tgt) bool {
 	if !FileExists(tgt.a) {
 		return false
 	}
-	if FileExists(tgt.a + ".do") {
-		return false
-	}
-	if FileExists(tgt.dep) {
+	tgtH, tgtT := pathSplit(tgt.a)
+	if do, _, _ := findDo(nil, tgt.a, tgtH, tgtT); do != "" {
 		return false
 	}
 	return true
diff --git a/t/apenwarr-120-defaults-flat.t b/t/apenwarr-120-defaults-flat.t
deleted file mode 120000
index 5b698cda62b3e2881aa0458ad0d715053fcdeb6dc55ab0dc958fa5daf2a392f8..0000000000000000000000000000000000000000
--- a/t/apenwarr-120-defaults-flat.t
+++ /dev/null
@@ -1 +0,0 @@
-apenwarr/wrapper.rc
\ No newline at end of file
diff --git a/t/apenwarr/120-defaults-flat/.gitignore b/t/apenwarr/120-defaults-flat/.gitignore
deleted file mode 100644
index 8a8d4d4eb08e4a314e784bb2dfda89c56356ebbbe3321bef925445a6ff9ad2db..0000000000000000000000000000000000000000
--- a/t/apenwarr/120-defaults-flat/.gitignore
+++ /dev/null
@@ -1,6 +0,0 @@
-c
-c.c
-c.c.c
-c.c.c.b
-c.c.c.b.b
-d
diff --git a/t/apenwarr/120-defaults-flat/all.do b/t/apenwarr/120-defaults-flat/all.do
deleted file mode 100644
index 38334b11ead319f8a202b7270792291945312011340bb09040eef220521db762..0000000000000000000000000000000000000000
--- a/t/apenwarr/120-defaults-flat/all.do
+++ /dev/null
@@ -1 +0,0 @@
-redo-ifchange c d
diff --git a/t/apenwarr/120-defaults-flat/c.c.c.b.b.a b/t/apenwarr/120-defaults-flat/c.c.c.b.b.a
deleted file mode 100644
index 8751962d9af200ee221f0940651faa11cd11a4c13ad0809adc5bafe54509c5b6..0000000000000000000000000000000000000000
--- a/t/apenwarr/120-defaults-flat/c.c.c.b.b.a
+++ /dev/null
@@ -1 +0,0 @@
-chicken
diff --git a/t/apenwarr/120-defaults-flat/c.do b/t/apenwarr/120-defaults-flat/c.do
deleted file mode 100644
index 3c06f1bc1db6783a09d31207e4a4a730c34bee02a1509f0c8dd6c2605117311e..0000000000000000000000000000000000000000
--- a/t/apenwarr/120-defaults-flat/c.do
+++ /dev/null
@@ -1,3 +0,0 @@
-redo-ifchange $1.c
-echo c.do
-cat $1.c
diff --git a/t/apenwarr/120-defaults-flat/clean.do b/t/apenwarr/120-defaults-flat/clean.do
deleted file mode 100644
index 3bd22cbd374504c3507a3ab5c9e7b01c7aacf154e74cd8abaf943ee98e7b5ccf..0000000000000000000000000000000000000000
--- a/t/apenwarr/120-defaults-flat/clean.do
+++ /dev/null
@@ -1,2 +0,0 @@
-rm -f c c.c c.c.c c.c.c.b c.c.c.b.b d \
-	*~ .*~
diff --git a/t/apenwarr/120-defaults-flat/default.b.do b/t/apenwarr/120-defaults-flat/default.b.do
deleted file mode 100644
index 408d58bb8140727443819f0819dc5733435c41ac9b1ff029349cf2643612b0f3..0000000000000000000000000000000000000000
--- a/t/apenwarr/120-defaults-flat/default.b.do
+++ /dev/null
@@ -1,10 +0,0 @@
-if [ -e "$1.a" -o -e "default${1#$2}.a" ]; then
-	redo-ifchange "$1.a"
-	echo a-to-b
-	cat "$1.a"
-else
-	redo-ifchange "$1.b"
-	echo b-to-b
-	cat "$1.b"
-fi
-../sleep 1.1
diff --git a/t/apenwarr/120-defaults-flat/default.c.c.do b/t/apenwarr/120-defaults-flat/default.c.c.do
deleted file mode 100644
index 3537f61ce4c12c7751c167bb0604f969035fc38156c9d105f3519f2654f2c85b..0000000000000000000000000000000000000000
--- a/t/apenwarr/120-defaults-flat/default.c.c.do
+++ /dev/null
@@ -1,4 +0,0 @@
-redo-ifchange $1.b
-echo b-to-cc
-cat $1.b
-../sleep 1.2
diff --git a/t/apenwarr/120-defaults-flat/default.c.do b/t/apenwarr/120-defaults-flat/default.c.do
deleted file mode 100644
index 225b4d0b6e25e1f63d0f9f7e24a1b282ecdc3a1a06e6c4b24a07ce8b11b3d620..0000000000000000000000000000000000000000
--- a/t/apenwarr/120-defaults-flat/default.c.do
+++ /dev/null
@@ -1,4 +0,0 @@
-redo-ifchange $1.c
-echo c-to-c
-cat $1.c
-../sleep 1.3
diff --git a/t/apenwarr/120-defaults-flat/default.do b/t/apenwarr/120-defaults-flat/default.do
deleted file mode 100644
index 1afdd37b8d54d3f8a0d8869323ffad2300aaf435e62dbb0409beafa94f92ea81..0000000000000000000000000000000000000000
--- a/t/apenwarr/120-defaults-flat/default.do
+++ /dev/null
@@ -1,4 +0,0 @@
-redo-ifchange c
-echo default-rule
-cat c
-../sleep 1.4
diff --git a/t/goredo-rel-ifcreate.t b/t/goredo-rel-ifcreate.t
index 825868f750a48d62ee746e7f95ec9f2a84942c4c164b4cbd78727fc98b8ee9a3..7d5d39c17aac3dd05deaf6e3501a85ddd96203177ac28ff66c310f924777c546 100755
--- a/t/goredo-rel-ifcreate.t
+++ b/t/goredo-rel-ifcreate.t
@@ -4,24 +4,24 @@ test_description="Proper relative to DirPrefix ifcreate paths"
 . $SHARNESS_TEST_SRCDIR/sharness.sh
 export REDO_TOP_DIR="`pwd`" REDO_NO_PROGRESS=1
 
-mkdir -p a/b/c a/c
-echo whatever >a/b/c/dep
-cat >a/b/default.do <<EOF
+mkdir -p a/b/c/d a/e
+echo whatever >a/b/dep
+cat >a/b/c/default.do <<EOF
 echo called \$1
-redo-ifcreate ../c/dep
-redo-ifchange c/dep
+redo-ifcreate ../../e/dep
+redo-ifchange ../dep
 EOF
-redo-ifchange a/b/c/file
-stat1=`stat a/b/c/file`
+redo-ifchange a/b/c/d/file
+stat1=`stat a/b/c/d/file`
 sleep 1 # stat does not output fractions of seconds
-redo-ifchange a/b/c/file
-stat2=`stat a/b/c/file`
+redo-ifchange a/b/c/d/file
+stat2=`stat a/b/c/d/file`
 
 test_expect_success "file stays same" '[ "$stat1" = "$stat2" ]'
 
-touch a/c/dep
-redo-ifchange a/b/c/file
-stat3=`stat a/b/c/file`
+touch a/e/dep
+redo-ifchange a/b/c/d/file
+stat3=`stat a/b/c/d/file`
 
 test_expect_success "ifcreate target works" '[ "$stat1" != "$stat3" ]'
 
diff --git a/usage.go b/usage.go
index 7c6682b89daac2b426b27a467b818187266b2cc79f756a7e428025124687641d..b135e2e967c9576312fdfb2622e10fa779f806cbe82a0647ef4f79512f93f3cc 100644
--- a/usage.go
+++ b/usage.go
@@ -22,7 +22,7 @@ 	"os"
 )
 
 const (
-	Version  = "2.6.5"
+	Version  = "2.7.0"
 	Warranty = `Copyright (C) 2020-2025 Sergey Matveev
 
 This program is free software: you can redistribute it and/or modify