Scald peaches with boiling water and quench cold. Peel skin and remove stones. Cut the peaches into pieces, mix with sugar and lemon juice and let stand for 30 minutes.
Finely chop the pistachios. Bring the peaches to the boil while stirring and let them boil fizzily for 4 minutes. Stir in pistachios. Pour peach jam into prepared jars and close them. Turn over immediately and let stand for 5 minutes.