diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b8c23a63..83562eb0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,10 @@ jobs:
         run: ./autogen.sh
 
       - name: Build
-        run: make
+        run: make -j2
 
       - name: Run tests
         run: make check
+
+      - name: Check distribution
+        run: make -j2 distcheck
diff --git a/Makefile.am b/Makefile.am
index 1b83a1e4..eb77e0d8 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,18 +1,14 @@
 ACLOCAL_AMFLAGS = -I m4
 SUBDIRS = src doc icons pixmaps data po
 
-BUILT_SOURCES = $(top_srcdir)/.version
-$(top_srcdir)/.version:
+BUILT_SOURCES = $(top_builddir)/.version
+MOSTLYCLEANFILES = $(top_builddir)/.version
+$(top_builddir)/.version:
 	echo $(VERSION) > $@-t && mv $@-t $@
 dist-hook:
 	echo $(VERSION) > $(distdir)/.tarball-version
 
-install-data-local:
-	@$(NORMAL_INSTALL)
-	$(INSTALL_DATA) $(top_srcdir)/AUTHORS $(DESTDIR)$(pkgdatadir)
-	$(INSTALL_DATA) $(top_srcdir)/NEWS $(DESTDIR)$(pkgdatadir)
-	$(INSTALL_DATA) $(top_srcdir)/README $(DESTDIR)$(pkgdatadir)
-	$(INSTALL_DATA) $(top_srcdir)/COPYING $(DESTDIR)$(pkgdatadir)
+pkgdata_DATA = AUTHORS NEWS README COPYING
 
 EXTRA_DIST = \
 	autogen.sh            \
diff --git a/data/satdata/Makefile.am b/data/satdata/Makefile.am
index 24162a36..a697a79f 100644
--- a/data/satdata/Makefile.am
+++ b/data/satdata/Makefile.am
@@ -1,5 +1,5 @@
 gpredict_satdir = $(pkgdatadir)/data/satdata
 
-gpredict_sat_DATA = satellites.dat *.cat
+gpredict_sat_DATA = satellites.dat $(top_srcdir)/data/satdata/*.cat
 
 EXTRA_DIST = $(gpredict_sat_DATA)
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 88ec1a2e..9a0e2ee7 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -24,7 +24,6 @@ src/gtk-sat-module-popup.c
 src/gtk-sat-module-tmg.c
 src/gtk-sat-popup-common.c
 src/gtk-sat-selector.c
-src/gtk-sat-tree.c
 src/gtk-single-sat.c
 src/gtk-sky-glance.c
 src/gui.c