4 files changed, 6 insertions, 6 deletions

diff --git a/files.txt b/files.txt
deleted file mode 100644
index afd71db..0000000
--- a/files.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-files.txt
-makefile
-README.md
-README.tex
-sandbox/01.tex
\ No newline at end of file
diff --git a/ls-R b/ls-R
new file mode 100644
index 0000000..fe0a183
--- /dev/null
+++ b/ls-R
@@ -0,0 +1,3 @@
+./makefile
+./README.md
+./README.tex
diff --git a/makefile b/makefile
index 6019fe2..0844d8f 100644
--- a/makefile
+++ b/makefile
@@ -3,7 +3,9 @@ all: clean
 clean:
         rm -rf .backup
         find -iname "*~" | xargs rm -rf
-        rsync -avPr --files-from=files.txt . .backup
+        find ./* -type f | grep 'makefile\|md$$\|tex$$' > ls-R
+        rsync -avPr --files-from=ls-R . .backup
+        cp ls-R .backup
         rm -rf *
         cp -p -r .backup/* .
         rm -rf .backup
diff --git a/sandbox/01.tex b/sandbox/01.tex
deleted file mode 100644
index e69de29..0000000
--- a/sandbox/01.tex
+++ /dev/null