diff --git a/01-uvod/y.tex b/01-uvod/01-uvod.tex
similarity index 100%
rename from 01-uvod/y.tex
rename to 01-uvod/01-uvod.tex
diff --git a/01-uvod/Makefile b/01-uvod/Makefile
index a96cb54b1102a2c03caa80bec68c55ff7f12a8b7..3e3d7273dda87a4926e41e0f2938b5da7d3553cf 100644
--- a/01-uvod/Makefile
+++ b/01-uvod/Makefile
@@ -1,11 +1,3 @@
-all: x.pdf y.pdf
+all: 01-uvod.pdf
 
-%.pdf: %.md
-	pandoc -f markdown -t beamer $< -o $@
-
-# Debugging output...
-%.tex: %.md
-	pandoc -f markdown -t beamer $< -o $@ -s
-
-y.pdf: y.tex
-	pdflatex $<
+include ../Makerules
diff --git a/01-uvod/x.md b/01-uvod/x.md
deleted file mode 100644
index 0f74509b410cea9ab0ace1384dd96620b967db0c..0000000000000000000000000000000000000000
--- a/01-uvod/x.md
+++ /dev/null
@@ -1,56 +0,0 @@
----
-title: 'Programování 1: Úvod do Pythonu'
-author: Martin Mareš
-institute: Katedra aplikované matematiky MFF UK
-date: ZS 2019
-theme: Warsaw
-toc: false
-indent: true
-header-includes: \setbeamerfont{title page}{family=\rmfamily}
----
-
-# Jak si nainstalovat Python
-
-- <http://www.python.org/>
-  - Python 3.x (pozor, ne 2.x)
-  - prostředí IDLE
-- <https://www.jetbrains.com/pycharm/>
-  - mnohem pokročilejší vývojové prostředí
-
-# Python jako kalkulačka
-
-	1+1
-	>>> 2
-
-	2+3*4+1
-	>>> 15
-
-	2+3 * 4+1
-	>>> 15
-
-	(2+3)*(4+1)
-	>>> 25
-
-	2**10
-	>>> 1024
-
-	2**100
-	>>> 1267650600228229401496703205376
-
-# ZZZ
-
-## Nadpis
-
-	aaa
-	bbb
-		ccc
-
-bbb
-
-aaa
-
-# Druhý slajd
-
-xyzzy
-
-# Třetí slajd
diff --git a/Makerules b/Makerules
new file mode 100644
index 0000000000000000000000000000000000000000..b3d45c3ddf5253d57b2cb0aec9faea13f68a9768
--- /dev/null
+++ b/Makerules
@@ -0,0 +1,8 @@
+export SHELL=/bin/bash
+
+%.pdf: %.tex
+	pdflatex $<
+
+clean::
+	rm -f *.{aux,log,nav,out,snm,toc,vrb}
+	rm -f *.pdf