diff --git a/recipes/langutils b/recipes/langutils
index e7b5ebf..b2df89e 100644
--- a/recipes/langutils
+++ b/recipes/langutils
@@ -6,8 +6,8 @@ WORKDIR /root
 # Dependencies
 #
 
-RUN apt update -qq \
- && DEBIAN_FRONTEND=noninteractive apt install -y --no-install-recommends \
+RUN apt-get update -qq \
+ && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
     # Common
     build-essential \
     ca-certificates \
@@ -19,7 +19,6 @@ RUN apt update -qq \
     # vhd2vl
     flex \
     bison \
-    iverilog \
     # Surelog
     cmake \
     default-jre \
@@ -28,9 +27,9 @@ RUN apt update -qq \
  && curl -fsSL https://bazel.build/bazel-release.pub.gpg | gpg --dearmor -o /usr/share/keyrings/bazel-archive-keyring.gpg \
  && echo "deb [signed-by=/usr/share/keyrings/bazel-archive-keyring.gpg] \
     https://storage.googleapis.com/bazel-apt stable jdk1.8" | tee /etc/apt/sources.list.d/bazel.list \
- && apt update -qq \
- && DEBIAN_FRONTEND=noninteractive apt install -y --no-install-recommends bazel \
- && apt autoclean && apt clean && apt -y autoremove \
+ && apt-get update -qq \
+ && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends bazel \
+ && apt-get autoclean && apt-get clean && apt-get -y autoremove \
  && rm -rf /var/lib/apt/lists/*
 
 #
diff --git a/recipes/synthesis b/recipes/synthesis
index eb07c03..5d3332d 100644
--- a/recipes/synthesis
+++ b/recipes/synthesis
@@ -6,12 +6,13 @@ WORKDIR /root
 # Dependencies
 #
 
-RUN apt update -qq \
- && DEBIAN_FRONTEND=noninteractive apt install -y --no-install-recommends \
+RUN apt-get update -qq \
+ && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
     # Common
     build-essential \
     ca-certificates \
     git \
+    python3 \
     zlib1g-dev \
     # GHDL
     gnat \
@@ -23,12 +24,11 @@ RUN apt update -qq \
     tcl-dev \
     libffi-dev \
     pkg-config \
-    python3 \
     # Synlig
     cmake \
     default-jre \
     python3-orderedmultidict \
- && apt autoclean && apt clean && apt -y autoremove \
+ && apt-get autoclean && apt-get clean && apt-get -y autoremove \
  && rm -rf /var/lib/apt/lists/*
 
 #
@@ -83,12 +83,12 @@ RUN cd /usr/local/lib && rm -fr libghdlvpi.so libghw.so python3.* \
 
 FROM ubuntu:latest
 
-RUN apt update -qq \
- && DEBIAN_FRONTEND=noninteractive apt install -y --no-install-recommends \
+RUN apt-get update -qq \
+ && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
     gnat \
     libreadline-dev \
     tcl-dev \
- && apt autoclean && apt clean && apt -y autoremove \
+ && apt-get autoclean && apt-get clean && apt-get -y autoremove \
  && rm -rf /var/lib/apt/lists/*
 
 COPY --from=build /usr/local/bin                 /usr/local/bin