build: Fix negation in sed character class

1 files changed, 1 insertions, 1 deletions

diff --git a/build b/build
index 97296cd..e643fa0 100755
--- a/build
+++ b/build
@@ -8,7 +8,7 @@ version = $$(printf '%s\n' '$(OPK_SOURCE_VERSION)' | \
 	sed 's|\(^[0-9][0-9]*\.[0-9][0-9]*\).*$$|\1|')
 
 dist_id = $$(printf '%s\n' "$${dist_name}" | tr '[A-Z]' '[a-z]' | \
-	sed 's|[!a-z0-9_]|_|g')
+	sed 's|[^a-z0-9_]|_|g')
 
 # Set the distribution name in dist-vars.sh, not here.
 script = \