diff --git a/.github/workflows/build-and-test-Xen.yaml b/.github/workflows/build-and-test-Xen.yaml
index c424cf2fc54..16ed5466faf 100644
--- a/.github/workflows/build-and-test-Xen.yaml
+++ b/.github/workflows/build-and-test-Xen.yaml
@@ -17,7 +17,7 @@ jobs:
           # user input
           DEBIAN_FRONTEND: noninteractive
         run: |
-          sudo apt-get install --no-install-recommends -y coreutils  build-essential gcc git make flex bison software-properties-common libwww-perl python
+          sudo apt-get install --no-install-recommends -y coreutils  build-essential gcc git make flex bison software-properties-common curl python
           sudo apt-get install --no-install-recommends -y bin86 gdb bcc liblzma-dev python-dev gettext iasl uuid-dev libncurses5-dev libncursesw5-dev pkg-config
           sudo apt-get install --no-install-recommends -y libgtk2.0-dev libyajl-dev sudo time ccache
 
diff --git a/COMPILING.md b/COMPILING.md
index f55a8dc9ccb..96bf7f1d4f4 100644
--- a/COMPILING.md
+++ b/COMPILING.md
@@ -21,17 +21,17 @@ We assume that you have a Debian/Ubuntu or Red Hat-like distribution.
    The GNU Make needs to be version 3.81 or higher.
    On Debian-like distributions, do as root:
    ```
-   apt-get install g++ gcc flex bison make git libwww-perl patch
+   apt-get install g++ gcc flex bison make git curl patch
    ```
    On Red Hat/Fedora or derivates, do as root:
    ```
-   dnf install gcc gcc-c++ flex bison perl-libwww-perl patch
+   dnf install gcc gcc-c++ flex bison curl patch
    ```
    Note that you need g++ version 5.0 or newer.
 
    On Amazon Linux and similar distributions, do as root:
    ```
-   yum install gcc72-c++ flex bison perl-libwww-perl patch tar
+   yum install gcc72-c++ flex bison curl patch tar
    ```
 
    To compile JBMC, you additionally need the JDK and Maven 3. You also
@@ -153,7 +153,7 @@ Follow these instructions:
 
 1. First install Cygwin, then from the Cygwin setup facility install the
    following packages: `flex, bison, tar, gzip, git, make, wget, patch,
-   libwww-perl`.
+   curl`.
 2. Get the CBMC source via
    ```
    git clone https://github.com/diffblue/cbmc cbmc-git
diff --git a/buildspec-linux-clang-3.8.yml b/buildspec-linux-clang-3.8.yml
index e7d8fe0312f..a5a8813c1d4 100644
--- a/buildspec-linux-clang-3.8.yml
+++ b/buildspec-linux-clang-3.8.yml
@@ -10,7 +10,7 @@ phases:
     commands:
       - sed -i 's#/archive.ubuntu.com#/us-east-1.ec2.archive.ubuntu.com#g' /etc/apt/sources.list
       - apt-get update -y
-      - apt-get install -y clang-3.8 flex bison make git libwww-perl patch ccache libc6-dev-i386 jq openjdk-8-jdk maven
+      - apt-get install -y clang-3.8 flex bison make git curl patch ccache libc6-dev-i386 jq openjdk-8-jdk maven
   build:
     commands:
       - echo Build started on `date`
diff --git a/buildspec-linux-clang.yml b/buildspec-linux-clang.yml
index ec78098a47f..ff790c8eb5c 100644
--- a/buildspec-linux-clang.yml
+++ b/buildspec-linux-clang.yml
@@ -14,7 +14,7 @@ phases:
       - wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
       - add-apt-repository 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-8 main'
       - apt-get update -y
-      - apt-get install -y clang-8 flex bison make git libwww-perl patch ccache libc6-dev-i386 jq gdb
+      - apt-get install -y clang-8 flex bison make git curl patch ccache libc6-dev-i386 jq gdb
   build:
     commands:
       - echo Build started on `date`
diff --git a/buildspec-linux-cmake-gcc-cov.yml b/buildspec-linux-cmake-gcc-cov.yml
index e4f960bd4cd..38690fb6fa7 100644
--- a/buildspec-linux-cmake-gcc-cov.yml
+++ b/buildspec-linux-cmake-gcc-cov.yml
@@ -13,7 +13,7 @@ phases:
       - sed -i 's#/archive.ubuntu.com#/us-east-1.ec2.archive.ubuntu.com#g' /etc/apt/sources.list
       - add-apt-repository ppa:ubuntu-toolchain-r/test
       - apt-get update -y
-      - apt-get install -y flex bison make git libwww-perl patch ccache libc6-dev-i386 jq lcov cmake curl gdb
+      - apt-get install -y flex bison make git curl patch ccache libc6-dev-i386 jq lcov cmake curl gdb
   build:
     commands:
       - echo Build started on `date`
diff --git a/buildspec-linux-cmake-gcc.yml b/buildspec-linux-cmake-gcc.yml
index 1e7973272f7..51ba6a538cf 100644
--- a/buildspec-linux-cmake-gcc.yml
+++ b/buildspec-linux-cmake-gcc.yml
@@ -12,7 +12,7 @@ phases:
     commands:
       - sed -i 's#/archive.ubuntu.com#/us-east-1.ec2.archive.ubuntu.com#g' /etc/apt/sources.list
       - apt-get update -y
-      - apt-get install -y flex bison make git libwww-perl patch ccache libc6-dev-i386 jq cmake
+      - apt-get install -y flex bison make git curl patch ccache libc6-dev-i386 jq cmake
   build:
     commands:
       - echo Build started on `date`
diff --git a/buildspec-linux-make-gcc-cov.yml b/buildspec-linux-make-gcc-cov.yml
index 269b5778d45..6950a03d5e4 100644
--- a/buildspec-linux-make-gcc-cov.yml
+++ b/buildspec-linux-make-gcc-cov.yml
@@ -12,7 +12,7 @@ phases:
     commands:
       - sed -i 's#/archive.ubuntu.com#/us-east-1.ec2.archive.ubuntu.com#g' /etc/apt/sources.list
       - apt-get update -y
-      - apt-get install -y flex bison make git libwww-perl patch ccache libc6-dev-i386 jq gdb lcov curl
+      - apt-get install -y flex bison make git curl patch ccache libc6-dev-i386 jq gdb lcov curl
   build:
     commands:
       - echo Build started on `date`
diff --git a/buildspec.yml b/buildspec.yml
index 078896c1477..add9840d7fd 100644
--- a/buildspec.yml
+++ b/buildspec.yml
@@ -13,7 +13,7 @@ phases:
     commands:
       - sed -i 's#/archive.ubuntu.com#/us-east-1.ec2.archive.ubuntu.com#g' /etc/apt/sources.list
       - apt-get update -y
-      - apt-get install -y flex bison make git libwww-perl patch ccache libc6-dev-i386 jq gdb libxml2-utils
+      - apt-get install -y flex bison make git curl patch ccache libc6-dev-i386 jq gdb libxml2-utils
   build:
     commands:
       - echo Build started on `date`
diff --git a/integration/xen/Dockerfile b/integration/xen/Dockerfile
index ed11b140c6a..dbbdab403b6 100644
--- a/integration/xen/Dockerfile
+++ b/integration/xen/Dockerfile
@@ -2,7 +2,7 @@ FROM ubuntu:16.04
 
 RUN apt-get update && apt-get --no-install-recommends -y install \
         build-essential gcc git make flex bison \
-        software-properties-common libwww-perl python \
+        software-properties-common curl python \
         bin86 gdb bcc liblzma-dev python-dev gettext iasl \
         uuid-dev libncurses5-dev libncursesw5-dev pkg-config \
         libgtk2.0-dev libyajl-dev sudo time
diff --git a/src/Makefile b/src/Makefile
index 5f5812c153d..19058120bd2 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -115,7 +115,7 @@ $(patsubst %, %_clean, $(DIRS)):
 
 # minisat2 and glucose download, for your convenience
 
-DOWNLOADER = lwp-download
+DOWNLOADER = curl -L --remote-name
 TAR = tar
 
 minisat2-download:
@@ -155,11 +155,13 @@ glucose-download:
 cadical_release = rel-06w
 cadical-download:
 	@echo "Downloading CaDiCaL $(cadical_release)"
-	@curl -L https://github.com/arminbiere/cadical/archive/$(cadical_release).tar.gz | tar xz
+	@$(DOWNLOADER) https://github.com/arminbiere/cadical/archive/$(cadical_release).tar.gz
+	@$(TAR) xfz $(cadical_release).tar.gz
 	@rm -Rf ../cadical
 	@mv cadical-$(cadical_release) ../cadical
 	@(cd ../cadical; patch -p1 < ../scripts/cadical-patch)
 	@cd ../cadical && CXX=$(CXX) CXXFLAGS=-O3 ./configure --debug && make
+	@$(RM) $(cadical_release).tar.gz
 
 doc :
 	doxygen