diff --git a/Makefile b/Makefile
index 070d33b..70485f2 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,28 @@ prefix := $(HOME)
 bindir := $(prefix)/bin
 mandir := $(prefix)/share/man/man1
 
-all: doc
+all: build doc
+
+build:
+	if [ -n "$$PYTHON" ] && "$$PYTHON" -c 'import mercurial' 2> /dev/null ; then \
+		: Use chosen Python version ; \
+	elif python3 -c 'import mercurial' 2> /dev/null ; then \
+		PYTHON=python3 ; \
+	elif python2 -c 'import mercurial' 2> /dev/null ; then \
+		PYTHON=python2 ; \
+	elif python -c 'import mercurial' 2> /dev/null ; then \
+		PYTHON=python ; \
+	fi ; \
+	if [ -n "$$PYTHON" ] ; then \
+		PYTHON=python ; \
+	fi ; \
+	mkdir -p bin ; \
+	for s in git-remote-hg git-hg-helper ; do \
+		printf "%s\n" "#!/usr/bin/env $$PYTHON" > "bin/$$s" ; \
+		tail -n +2 "./$$s" >> "bin/$$s" ; \
+		chmod 755 "bin/$$s" ; \
+		touch -r "./$$s" "bin/$$s" ; \
+	done
 
 doc: doc/git-remote-hg.1
 
@@ -15,13 +36,14 @@ doc/git-remote-hg.1: doc/git-remote-hg.txt
 
 clean:
 	$(RM) doc/git-remote-hg.1
+	$(RM) -r bin/
 
 D = $(DESTDIR)
 
-install:
+install: build
 	install -d -m 755 $(D)$(bindir)/
-	install -m 755 git-remote-hg $(D)$(bindir)/git-remote-hg
-	install -m 755 git-hg-helper $(D)$(bindir)/git-hg-helper
+	install -m 755 bin/git-remote-hg $(D)$(bindir)/git-remote-hg
+	install -m 755 bin/git-hg-helper $(D)$(bindir)/git-hg-helper
 
 install-doc: doc
 	install -d -m 755 $(D)$(mandir)/
@@ -39,4 +61,4 @@ pypi-upload:
 pypi-test:
 	twine upload --repository-url https://test.pypi.org/legacy/ dist/*
 
-.PHONY: all test install install-doc clean pypy pypy-upload
+.PHONY: all build test install install-doc clean pypy pypy-upload