diff --git a/doc/building/linux.md b/doc/building/linux.md
index 2d33ad0554b016ffa752c0cab6c90f7aa0fecc34..e41ac49ebc49a7957dd6c25649e89bd68bf982ea 100644
--- a/doc/building/linux.md
+++ b/doc/building/linux.md
@@ -48,7 +48,7 @@ mkdir build
 # Change to it
 cd build
 # run CMake for initial setup
-cmake -DCMAKE_INSTALL_PREFIX=${PWD}/install_dir -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_BUILD_TYPE=Debug -DWITH_INTERNAL_2GEOM=ON -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -G Ninja ..
+cmake -DCMAKE_INSTALL_PREFIX="${PWD}/install_dir" -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_BUILD_TYPE=Debug -DWITH_INTERNAL_2GEOM=ON -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -G Ninja ..
 # compile
 ninja install
 # run
diff --git a/doc/building/windows.md b/doc/building/windows.md
index 4debda5b6b6b62a10baca32395875076bacae390..fcd80aec66700013259ec6326b043a88afcd215e 100644
--- a/doc/building/windows.md
+++ b/doc/building/windows.md
@@ -67,7 +67,7 @@ cd build
 # should always point to the root folder of your copy of the Inkscape source.
 
 # ( For details on these build flags, see below "Build Flags" )
-cmake -G Ninja -DCMAKE_INSTALL_PREFIX=${PWD}/install_dir -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=OFF -DWITH_INTERNAL_2GEOM=ON  -DCMAKE_EXPORT_COMPILE_COMMANDS=ON ..
+cmake -G Ninja -DCMAKE_INSTALL_PREFIX="${PWD}/install_dir" -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=OFF -DWITH_INTERNAL_2GEOM=ON  -DCMAKE_EXPORT_COMPILE_COMMANDS=ON ..
 
 # start the compilation and
 # install compiled files and all dependencies required to run Inkscape into the