diff --git a/.github/script/amd64-18.04.Dockerfile b/.github/script/amd64-18.04.Dockerfile
index b173e73a..c46b4bcc 100644
--- a/.github/script/amd64-18.04.Dockerfile
+++ b/.github/script/amd64-18.04.Dockerfile
@@ -7,7 +7,7 @@ RUN apt install -y build-essential cmake clang openssl libssl-dev zlib1g-dev gpe
 WORKDIR /
 
 ARG BRANCH
-RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $env:BRANCH
+RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $BRANCH
 
 WORKDIR /ton
 RUN mkdir /ton/build
diff --git a/.github/script/amd64-20.04.Dockerfile b/.github/script/amd64-20.04.Dockerfile
index e96c155e..ba78f1a2 100644
--- a/.github/script/amd64-20.04.Dockerfile
+++ b/.github/script/amd64-20.04.Dockerfile
@@ -7,7 +7,7 @@ RUN apt install -y build-essential cmake clang openssl libssl-dev zlib1g-dev gpe
 WORKDIR /
 
 ARG BRANCH
-RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $env:BRANCH
+RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $BRANCH
 
 WORKDIR /ton
 RUN mkdir /ton/build
diff --git a/.github/script/amd64-22.04.Dockerfile b/.github/script/amd64-22.04.Dockerfile
index 67fdc376..16cfbfec 100644
--- a/.github/script/amd64-22.04.Dockerfile
+++ b/.github/script/amd64-22.04.Dockerfile
@@ -7,7 +7,7 @@ RUN apt install -y build-essential cmake clang openssl libssl-dev zlib1g-dev gpe
 WORKDIR /
 
 ARG BRANCH
-RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $env:BRANCH
+RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $BRANCH
 
 WORKDIR /ton
 RUN mkdir /ton/build
diff --git a/.github/script/arm64-18.04.Dockerfile b/.github/script/arm64-18.04.Dockerfile
index 67fb07d7..5a0efc6f 100644
--- a/.github/script/arm64-18.04.Dockerfile
+++ b/.github/script/arm64-18.04.Dockerfile
@@ -7,7 +7,7 @@ RUN apt install -y build-essential cmake clang openssl libssl-dev zlib1g-dev gpe
 WORKDIR /
 
 ARG BRANCH
-RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $env:BRANCH
+RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $BRANCH
 
 WORKDIR /ton
 RUN mkdir /ton/build
diff --git a/.github/script/arm64-20.04.Dockerfile b/.github/script/arm64-20.04.Dockerfile
index 83361aac..f29a3fd0 100644
--- a/.github/script/arm64-20.04.Dockerfile
+++ b/.github/script/arm64-20.04.Dockerfile
@@ -7,7 +7,7 @@ RUN apt install -y build-essential cmake clang openssl libssl-dev zlib1g-dev gpe
 WORKDIR /
 
 ARG BRANCH
-RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $env:BRANCH
+RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $BRANCH
 
 WORKDIR /ton
 RUN mkdir /ton/build
diff --git a/.github/script/arm64-22.04.Dockerfile b/.github/script/arm64-22.04.Dockerfile
index a7374881..73a3cff6 100644
--- a/.github/script/arm64-22.04.Dockerfile
+++ b/.github/script/arm64-22.04.Dockerfile
@@ -7,7 +7,7 @@ RUN apt install -y build-essential cmake clang openssl libssl-dev zlib1g-dev gpe
 WORKDIR /
 
 ARG BRANCH
-RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $env:BRANCH
+RUN git clone --recurse-submodules https://github.com/ton-blockchain/ton.git && cd ton && git checkout $BRANCH
 
 WORKDIR /ton
 RUN mkdir /ton/build