diff --git a/.envrc b/.envrc
index fc35e69..a949951 100644
--- a/.envrc
+++ b/.envrc
@@ -1,73 +1,55 @@
 # -*- mode: sh; -*-
-# Thanks <https://github.com/direnv/direnv/issues/73#issuecomment-152284914>
-export_function()
-{
-  local name=$1
-  local alias_dir=$PWD/.direnv/aliases
-  mkdir -p "$alias_dir"
-  PATH_add "$alias_dir"
-  local target="$alias_dir/$name"
-  if declare -f "$name" >/dev/null; then
-    echo "#!$SHELL" > "$target"
-    declare -f "$name" >> "$target" 2>/dev/null
-    # Notice that we add shell variables to the function trigger.
-    echo "$name \$*" >> "$target"
-    chmod +x "$target"
-  fi
-}
 
-use_guix()
-{
-    # Recreate a garbage collector root.
-    gcroots="$HOME/.config/guix/gcroots"
-    mkdir -p "$gcroots"
-    gcroot="$gcroots/guix"
-    if [ -L "$gcroot" ]
-    then
-        rm -v "$gcroot"
-    fi
+export CC=gcc CXX="g++ -fdiagnostics-color=always"
 
-    # Miscellaneous packages.
-    ENVIRONMENTS=(
-        weechat # Debug runs
-        profanity # Test
-    )
+# Miscellaneous packages.
+ENVIRONMENTS=(
+    weechat # Debug runs
+    profanity # Test
+)
 
-    # Environment packages.
-    PACKAGES=(
-        profanity # Test
-        autoconf # Deps with autoreconf
-        autoconf-archive # Deps with m4 tooling
-        automake # Deps with automake
-        libtool # Deps with libtool
-        make # Makefile and deps with makefiles
-        cmake # Deps with cmake
-        gcc-toolchain@11 # Compilation
-        pkg-config # Deps configuration and configuration of deps deps
-        patchelf # Fix linkage (guix)
-        bear # Generate compile_commands.json for language servers
-        universal-ctags # Generate tags (make tags)
-        weechat # Weechat includes
-        libxml2 # Dep (libxml2)
-        libstrophe # Dep (strophe)
-        libgcrypt # Dep (gcrypt)
-        lmdb # Dep (lmdb)
-        rnp # Dep (rnpgp)
-        libsignal-protocol-c -l libomemo.scm # Dep (libsignal)
-    )
+# Environment packages.
+PACKAGES=(
+    profanity # Test
+    autoconf # Deps with autoreconf
+    autoconf-archive # Deps with m4 tooling
+    automake # Deps with automake
+    libtool # Deps with libtool
+    make # Deps with makefiles
+    cmake # Deps with cmake
+    doctest # Testing
+    gcc-toolchain@10 # Compilation
+    pkg-config # Deps configuration and configuration of deps deps
+    patchelf # Fix linkage (guix)
+    bear # Generate compile_commands.json for language servers
+    universal-ctags # Generate tags (make tags)
+    weechat # Weechat includes
+    libxml2 # Dep (libxml2)
+    libstrophe # Dep (strophe)
+    libgcrypt # Dep (gcrypt)
+    libsignal-protocol-c -l libomemo.scm # Dep (libsignal)
+    lmdb lmdbxx # Dep (lmdb)
+    rnp # Dep (rnpgp)
+)
 
-    # Thanks <https://lists.gnu.org/archive/html/guix-devel/2016-09/msg00859.html>
-    eval "$(guix environment --search-paths --root="$gcroot" ${ENVIRONMENTS[@]} --ad-hoc ${PACKAGES[@]} "$@")"
+echo direnv: fetching source - weechat
+mkdir -p /tmp/guix-build-weechat-3.2.drv-0
+tar -C /tmp/guix-build-weechat-3.2.drv-0 -xJf $(guix build --source weechat)
 
-    export CC=gcc
-}
+echo direnv: fetching source - libomemo-c
+mkdir -p /tmp/guix-build-libomemo-c-2.3.3.drv-0
+ln -sf $(guix build --source -f libomemo.scm) /tmp/guix-build-libomemo-c-2.3.3.drv-0
+
+echo direnv: fetching source - lmdb
+ln -sf $(guix build --source lmdb)/libraries/liblmdb/mdb.c mdb.c
 
 use guix \
+    ${ENVIRONMENTS[@]} --ad-hoc ${PACKAGES[@]} \
     --with-debug-info=profanity\
-    --with-debug-info=weechat\
-    --with-debug-info=libstrophe\
-    --with-debug-info=libsignal-protocol-c\
+    --with-debug-info=weechat \
+    --with-debug-info=libstrophe \
+    --with-debug-info=libsignal-protocol-c \
     --with-debug-info=libomemo-c\
-    --with-debug-info=lmdb\
-    --with-debug-info=rnp\
-    clang:extra gdb lmdb
+    --with-debug-info=lmdb \
+    --with-debug-info=rnp \
+    clang clang:extra ccls gdb
diff --git a/.gitignore b/.gitignore
index 0a32016..3ca5841 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,11 +47,5 @@ cscope*
 *.idb
 *.pdb
 
-# Kernel Module Compile Results
-*.mod*
-*.cmd
-.tmp_versions/
-modules.order
-Module.symvers
-Mkfile.old
-dkms.conf
+# Symbolic links
+mdb.c