diff --git a/deploy/packaging/tr1d1um.spec b/deploy/packaging/tr1d1um.spec
index 9ea4306d..830d1d56 100644
--- a/deploy/packaging/tr1d1um.spec
+++ b/deploy/packaging/tr1d1um.spec
@@ -26,7 +26,7 @@ The Webpa object translator.
 %setup -q
 
 %build
-GO111MODULE=on GOPROXY=https://proxy.golang.org go build -ldflags "-linkmode=external -X 'main.BuildTime=`date -u '+%Y-%m-%d %H:%M:%S'`' -X main.GitCommit={{{ git_short_hash }}} -X main.Version=%{version}" -o %{name} .
+GOPROXY=https://proxy.golang.org go build -ldflags "-linkmode=external -X 'main.BuildTime=`date -u '+%c'`' -X main.GitCommit={{{ git_short_hash }}} -X main.Version=%{version}" -o %{name} .
 
 %install
 echo rm -rf %{buildroot}