CI: Use basolute path for cargo binary

.gitlab-ci.yml

@@ -29,11 +29,11 @@
         - curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs > rustup.sh
         - chmod +x ./rustup.sh
         - ./rustup.sh -y --default-toolchain beta
-        - source ~/.cargo/env
+        - source $HOME/.cargo/env
     script:
-        - ~/.cargo/bin/cargo build --manifest-path src/rust/liblektor-rs/Cargo.toml
-        - ~/.cargo/bin/cargo build --manifest-path src/rust/amadeus-rs/Cargo.toml
-        - cmake -Bbuild -DCMAKE_RUST_COMPILER=~/.cargo/bin/cargo -DCMAKE_C_COMPILER=${c_compiler} -DCMAKE_CXX_COMPILER=${cxx_compiler} && make -Cbuild
+        - $HOME/.cargo/bin/cargo build --manifest-path src/rust/liblektor-rs/Cargo.toml
+        - $HOME/.cargo/bin/cargo build --manifest-path src/rust/amadeus-rs/Cargo.toml
+        - cmake -Bbuild -DCMAKE_RUST_COMPILER=$HOME/.cargo/bin/cargo -DCMAKE_C_COMPILER=${c_compiler} -DCMAKE_CXX_COMPILER=${cxx_compiler} && make -Cbuild
 
 variables:
     GIT_DEPTH: 3 # No need to clone all the history