diff --git a/Dockerfile b/Dockerfile
index 6725aaa..2236a88 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -78,6 +78,7 @@ RUN set -e; \
   dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
diff --git a/Dockerfile.18.04 b/Dockerfile.18.04
index 9bc8038..be59dee 100644
--- a/Dockerfile.18.04
+++ b/Dockerfile.18.04
@@ -78,6 +78,7 @@ RUN set -e; \
   dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
diff --git a/Dockerfile.19.04 b/Dockerfile.19.04
index 56bfc72..889028b 100644
--- a/Dockerfile.19.04
+++ b/Dockerfile.19.04
@@ -78,6 +78,7 @@ RUN set -e; \
   dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
diff --git a/Dockerfile.20.04 b/Dockerfile.20.04
index 838c91e..b35426f 100644
--- a/Dockerfile.20.04
+++ b/Dockerfile.20.04
@@ -78,6 +78,7 @@ RUN set -e; \
   dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
diff --git a/Dockerfile.21.04 b/Dockerfile.21.04
index 8012ba0..b70caae 100644
--- a/Dockerfile.21.04
+++ b/Dockerfile.21.04
@@ -78,6 +78,7 @@ RUN set -e; \
   dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
diff --git a/Dockerfile.22.04 b/Dockerfile.22.04
index 45efdbe..ee7bf6e 100644
--- a/Dockerfile.22.04
+++ b/Dockerfile.22.04
@@ -78,6 +78,7 @@ RUN set -e; \
   dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
diff --git a/Dockerfile.23.04 b/Dockerfile.23.04
index f367c1f..0d0ba49 100644
--- a/Dockerfile.23.04
+++ b/Dockerfile.23.04
@@ -78,6 +78,7 @@ RUN set -e; \
   dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
diff --git a/Dockerfile.23.10 b/Dockerfile.23.10
index 07b7d15..47393eb 100644
--- a/Dockerfile.23.10
+++ b/Dockerfile.23.10
@@ -78,6 +78,7 @@ RUN set -e; \
   dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
diff --git a/Dockerfile.24.04 b/Dockerfile.24.04
index 21adac7..73f5380 100644
--- a/Dockerfile.24.04
+++ b/Dockerfile.24.04
@@ -78,6 +78,7 @@ RUN set -e; \
   dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
diff --git a/Dockerfile.24.10 b/Dockerfile.24.10
index 6e784a6..580d6e8 100644
--- a/Dockerfile.24.10
+++ b/Dockerfile.24.10
@@ -78,6 +78,7 @@ RUN set -e; \
   dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu