diff --git a/Dockerfile b/Dockerfile
index 842a604..7dcbb43 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -51,7 +51,11 @@ ENV MFT_VERSION=4.33.0-169
 ARG PACKAGES="dpkg-dev=1.22.6ubuntu6.5"
 
 # enable deb-src repos
-RUN sed -i 's/^Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/ubuntu.sources
+RUN if [ -f /etc/apt/sources.list.d/ubuntu.sources ]; then \
+    sed -i 's/^Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/ubuntu.sources; \
+    elif [ -f /etc/apt/sources.list ]; then \
+    sed -i 's/^#\s*deb-src/deb-src/' /etc/apt/sources.list; \
+    fi
 
 RUN apt-get update -y
 RUN apt-get install -y --no-install-recommends ${PACKAGES}
diff --git a/Dockerfile.nic-configuration-daemon b/Dockerfile.nic-configuration-daemon
index 761145b..7f4a211 100644
--- a/Dockerfile.nic-configuration-daemon
+++ b/Dockerfile.nic-configuration-daemon
@@ -34,7 +34,11 @@ ENV MFT_VERSION=4.33.0-169
 ARG PACKAGES="dpkg-dev=1.22.6ubuntu6.5 libusb-1.0-0=2:1.0.27-1 ipmitool=1.8.19-7ubuntu0.24.04.3 rshim curl=8.5.0-2ubuntu10.6 systemd-sysv=255.4-1ubuntu8.12 mstflint=4.26.0+1-2ubuntu3"
 
 # enable deb-src repos
-RUN sed -i 's/^Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/ubuntu.sources
+RUN if [ -f /etc/apt/sources.list.d/ubuntu.sources ]; then \
+    sed -i 's/^Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/ubuntu.sources; \
+    elif [ -f /etc/apt/sources.list ]; then \
+    sed -i 's/^#\s*deb-src/deb-src/' /etc/apt/sources.list; \
+    fi
 
 RUN apt-get update -y
 RUN apt-get install -y --no-install-recommends ${PACKAGES}