Make work from only url with clean folder.

Add hard depencies definitions for version.scm that prevented building on some systems.

ebuild/fetchers/Makefile.am

@@ -24,6 +24,13 @@ SOURCES = \
 	pypi.scm \
 	raw.scm
 
+# Manual dependencys.
+ebuild.go:  ../version.scm
+forgejo.go: ../version.scm
+github.go:  ../version.scm
+pypi.go:    ../version.scm
+raw.scm:    ../version.scm
+
 GOBJECTS = $(SOURCES:%.scm=%.go)
 
 nobase_mod_DATA = $(SOURCES) $(NOCOMP_SOURCES)
@@ -46,3 +53,7 @@ GUILE_OPTS = -L $(abs_top_builddir)
 SUFFIXES = .scm .go
 .scm.go:
 	$(GUILD) compile $(GUILE_TARGET) $(GUILE_OPTS)  $(GUILE_WARNINGS) -o "$@" "$<"
+
+# Build dep in parent folder.
+../version.scm:
+	$(am__cd) ../ && $(MAKE) $(AM_MAKEFLAGS) version.scm