diff --git a/firefox/.env b/firefox/.env
index aac281f..bd34067 100644
--- a/firefox/.env
+++ b/firefox/.env
@@ -3,6 +3,8 @@ MYVNC_FIREFOX_PORT=
 MYVNC_FIREFOX_VNCPASS=
 
 MYVNC_FIREFOX_CUSTOM_TITLE=
+
+MYVNC_DOMAIN=
 MYVNC_FIREFOX_PROXYPATH=
 
 MYVNC_FIREFOX_URL=
diff --git a/firefox/build b/firefox/build
index fe44626..8998641 100755
--- a/firefox/build
+++ b/firefox/build
@@ -11,5 +11,6 @@ DOCKER_BUILDKIT=1 \
 docker build . \
     --build-arg addpkg=${addpkg:-""} \
     --build-arg debug=${debug:-""} \
-    --tag ${buildtag:-myvnc/arch/firefox}
+    --tag ${buildtag:-myvnc/arch/firefox} \
+    ${@}
 rm mirrorlist
diff --git a/i3/.env b/i3/.env
index 7b52d01..eaa26fa 100644
--- a/i3/.env
+++ b/i3/.env
@@ -3,6 +3,8 @@ MYVNC_I3_PORT=
 MYVNC_I3_VNCPASS=
 
 MYVNC_I3_CUSTOM_TITLE=
+
+MYVNC_DOMAIN=
 MYVNC_I3_PROXYPATH=
 
 MYVNC_I3_VNCSHARING=
diff --git a/i3/build b/i3/build
index 553b960..cd29a6f 100755
--- a/i3/build
+++ b/i3/build
@@ -11,5 +11,6 @@ DOCKER_BUILDKIT=1 \
 docker build . \
     --build-arg addpkg=${addpkg:-""} \
     --build-arg debug=${debug:-""} \
-    --tag ${buildtag:-myvnc/arch/i3}
+    --tag ${buildtag:-myvnc/arch/i3} \
+    ${@}
 rm mirrorlist
diff --git a/plasma/.env b/plasma/.env
index 9098a80..852e83f 100644
--- a/plasma/.env
+++ b/plasma/.env
@@ -3,6 +3,8 @@ MYVNC_KDEPLASMA_PORT=
 MYVNC_KDEPLASMA_VNCPASS=
 
 MYVNC_KDEPLASMA_CUSTOM_TITLE=
+
+MYVNC_DOMAIN=
 MYVNC_KDEPLASMA_PROXYPATH=
 
 MYVNC_KDEPLASMA_VNCSHARING=